You never know what you've got until it's gone. There are some people that we hate, feel indifferent to, or just don't feel like being around. But we're stuck with them, so we muddle through and put up with them because there's nothing we can do about it. Then, that person is suddenly out of our lives. Great, right? Wrong.
For some reason, you take their absence a lot harder than you expected to. It's not until they're gone that you start to like them. Maybe you've become so used to their little quirks you can't imagine your life without them. Or maybe you realize that they're the best thing to ever happen to you. Whatever the case, you realize too late that you actually love them.
It doesn't necessarily have to be romantic, in which case it may involve The Not-Love Interest. It can be that annoying kid down the block that you unintentionally grew fond of or a relative you never appreciated. Though it could also be an ex-lover that you fell back in love with or a friend you never saw in a romantic light. Sometimes, you learn a little too late that the person you miss was better than you initially believed them to be.
A strong risk of separation is sometimes enough to invoke this trope. Then whoever has fallen in love will do anything to stay with the object of their affection. Reunions are possible, but not always. In nasty cases, this may result in the person who had the epiphany going off the deep end.
Subtrope of Love Epiphany. Oblivious to Love characters may be prone to this. Compare Can't Live with Them, Can't Live without Them, Fond Memories That Could Have Been and We Want Our Jerk Back!. Contrast Absence Makes the Heart Go Yonder.
Note: This is not the same as losing someone you already loved.
- In one of the manga adaptations of Amagami, Kaoru only realises that she actually loves Junichi after he and their class rep Tsukasa start going out. Unluckily for Kaoru, this manga takes place on the Tsukasa route.
- Ayakashi Triangle: Garaku was very close to Suzu's past life Mei. His brief flashback shows them connecting very quickly, but Garaku didn't realize he loved Mei until after she was killed by her village.
- In Beyond the Boundary, Akihito realizes he's in love with Mirai after Mirai had already sacrificed herself to the Beyond the Boundary and wiped herself from existence in order to save him (and humanity) from his Supowerpowered Evil Side.
- Freezing: Kazuha Aoi is a familial example. Because of her strong connection to an otherworldly presence, she found herself detached from other humans who didn't have a stigmatic body, including her mother. This led to a tragic event where she killed her mother, only to start crying after her spirit visits her a final time to say goodbye and not blame herself. She later notes that she could only truly understand what her mother went through after raising her brother.
- Fushigi Yuugi: In episode 10, after Tamahome saves Miaka from an attacking tiger and scolds her out of worry, she ditches his concern. Instead of firing her back, he hugs her while confessing that he has been missing her as well as realized to have fallen in love with her while she was gone (back to her world) for 3 months.
- In I Wish, Seven doesn't notice he's fallen in love with his master until he dies, at which point Seven's heart breaks.
- In Mobile Suit Gundam SEED, Flay and Kira share a very unhealthy relationship wherein she basically tries to manipulate him onto a path of self-destruction (blaming him for her father's death), but it's not until Kira is seemingly killed by Athrun that Flay realizes she has fallen for him for real in the meantime. That particular subplot doesn't end well at all.
- Naruto: Heavily implied for Tsunade. Even though she always rejected Jiraiya's romantic advances since they were kids, it's clear she still saw him as a dear friend. When he leaves to Amegakure to face Pain, it's all but stated that she's finally willing to give him a chance, so she urges him to come back alive. He doesn't, leaving her absolutely heartbroken.
- My First Girlfriend Is a Gal: When Junichi begins dating a Gyaru Girl named Yukana, the narcissistic Alpha Bitch Yui Kashii (who has known him since middle school) becomes upset that her favorite "dog" has stopped obeying her, his "owner". She gives him a "fake" Love Confession simply to make him break up with Yukana, but gets rejected and angrily attempts to blackmail him instead (which also fails). She becomes more and more angry about "Doggy" not giving her any attention and more obsessed with getting him back, often wondering why she even cares so much. It isn't until someone else points out that she seems to like him that she finally understands why seeing him with another girl makes her so upset, but she still continues to deny it until all of her friends and admirers encourage her to confess her feelings again. She does so, and predictably gets rejected a second time. This time she graciously accepts defeat, but once alone, she breaks down and cries, suddenly realizing that she probably loved him from the moment they met, but never realized it until his heart belonged to someone else. However, she still decides to make herself a better person to please him; if she can't be his girlfriend, then she can be The Mistress.
- The Quintessential Quintuplets: Out of the five Nakano sisters, Itsuki is the only one who doesn't show romantic feelings for Fuutarou, instead developing a Vitriolic Best Buds dynamic with him. At least until the final chapters, but by then he's already made up his mind and chosen Yotsuba, and Itsuki is left wondering if she might have fallen for him as well.
- Partly occurs in the manga Shishunki no Iron Maiden. The heroine Tsukiko slowly falls for Childhood Friend Haruki over the story but still confessed to her initial crush and starts dating him, only realizing that her feelings have changed on said date upon reaching her boyfriend's room. Fortunately Haruki comes after her after said boyfriend shows his true colors and tries to attack her.
- Tokyo Ghoul:
- Tsukiyama spends months working with Kaneki, attempting to earn his trust so that he can eventually eat him. It's only after Kaneki is seemingly killed in battle that Tsukiyama is forced to realize he had come to genuinely care. Unable to cope with the loss, he spends the next two years in an Angst Coma and only finds the will to live when shown evidence of Kaneki's survival. He admits that he was happiest during the time he spent with Kaneki, and desperately tries to reclaim that lost time. But when confronted with Sasaki's conflicted feelings over his past, Tsukiyama realizes he can't bear to take away the other man's current happiness.
- After keeping others at arm's length throughout the series, Akira Mado loses both Amon and Takizawa in a single night. When confronted over her stoic attitude about the loss, she breaks down into tears and admits that she loved them both. Nearly three years later, she is forced to confront Takizawa after his transformation into a Half-Human Hybrid. At first, she takes part in the failed attempt at Staking the Loved One.....but ends up Taking the Bullet to protect him. Wounded, she admits that she can't stand the thought of losing him again.
- Related to the above, Takizawa experiences this with Akira more than once during the series. In the original series, he comes to realize his feelings for his former rival just before seemingly dying in battle. Come the sequel, he initially tries to kill her for "betraying" him but comes to his senses after she's wounded protecting him. He ends up switching sides and remains at her side during her treatment.
- Legion of Super-Heroes: Saturn Girl realized what she was in love with Lightning Lad when he was dying in her arms at the beginning of the The Death of Lightning Lad storyline.
Saturn Girl: Is there a bigger fool than a woman who realizes she's in love as she watches her man die?
- In Runaways, Nico begins to realize that she has feelings for Karolina after the latter has gone off to space to fulfill an arranged marriage. Adding to her turmoil, Karolina's intended has cut off all communication with the Runaways, leaving Nico to wonder if Karolina is even still alive.
- In Bastard (Harry Potter) Gil Alien realizes how much his family (and most of all not his mother, but his stepfather and step-siblings) means to him after he gets thrown into the past with hardly a hope of return.
- In The Dragon That Will Pierce the Heavens, Zoro stubbornly refuses to admit any romantic feelings for protagonist Hikari until she gets bitten by the Kestia tick and falls deathly ill in the Drum Island Arc. Even then, it takes Nami to point out she could die without him saying anything for Zoro to acknowledge his feelings and reunite with a Big Damn Kiss.
- Eyes on Me: Helen has been plotting to get Bitsy's money for years. However, it isn't until Bitsy dies after confessing her feelings for her in Chapter 14 of Cry For Help that Helen realizes the feeling was mutual.
- In the One-Punch Man NSFW fanfic Mirror Mirror, the alternate timeline Saitama thought Genos was annoying and clingy but otherwise saw him as a good friend. It isn't until Genos died that he realized that his feeling ran much deeper and spends the next five years mourning and rising through the ranks in Genos' memory.
- Naru-Hina Chronicles: In Chapter 86, Tsunade reveals to Shizune that, after Jiraiya died, she remembered all the times he had been around her. It was the first time she really understood that he loved her and that she loved him back.
- Pray for Us, Icarus: Aziraphale had previously believed that he was Just Friends with Crowley; however, after Crowley became mortal, several encounters with his more romantically-forward reincarnations led to Aziraphale realizing how much he loves him, leaving him lamenting that he hadn't realized this back while Crowley was still immortal and had all his memories.
- Professor Riddle's Chronicles: Riddle only realizes how much he cares about Bellatrix after the two of them get into a serious argument and she starts ignoring him completely.
- Sugar Rush: Rival Racing: Crumbelina is enraged when Jimmy tries to convince her not to participate in the fourth race, but regrets being so harsh with him when he seemingly gets killed by a bomb.
- Gone with the Wind: Scarlett doesn't see that Melanie was her closest and truest friend until Melanie is on her deathbed. Nor does she realize that she loves Rhett much more than she loves Ashley until Rhett decides to leave her.
- A plot point of the award-winning Taiwanese film Papa, Can You Hear Me Sing?. The film revolves around Uncle Mute, an ex-army veteran who now works as a garbage collector, and his only child Mei. Mei eventually grew up and moved to Taipei to be a successful singer, but somehow forgot completely about Uncle Mute. By the time Mei returns home to her adoptive father after having a change of heart near the end of the film, she's just in time to see him succumbing to pneumonia.
- Pixel Perfect: Roscoe falls in love with Samantha not long after she kisses him.
- Anne of Green Gables:
- Anne only realizes that she's in love with Gilbert when she learns that he's come down with a severe case of typhoid fever and might not make it through the night. She bitterly regrets not recognizing her feelings sooner, thinking he will die never knowing that she loved him. Fortunately, Gilbert recovers and they get engaged.
- John Meredith proposed to Rosemary West mostly for pragmatic reasons, but didn't think he could ever love her as much as his late first wife. Rosemary knew she would have to reject him because of a promise to her sister Ellen and wasn't too bothered because she thought she could never fall in love after losing her fiancee. But when John proposed, Rosemary couldn't reject him to his face because she just realized that she was in love with him. She asked him to give her time to think, and when Ellen refused to let her marry him, Rosemary wrote John a rejection letter. It's only after receiving the letter that John realized he genuinely loved her and was devastated when he thought she didn't feel the same way. Eventually Ellen relents, everything is cleared up between John and Rosemary, and they get married.
- Arcia Chronicles: Nanniel is a staunch proponent of Elven supremacy, permanently in opposition to her husband Asten and his brother Emzar's more pro-human stance. After Asten is killed by Nanniel's faction and Emzar decides that he had enough and leaves the hidden Elven kingdom with his supporters to live with the humans, Nanniel realizes that despite their differences, she has actually been in love with Emzar for thousands of years and decides to follow him. Ironically, she dies saving a bunch of human victims of a Roigian cult because that's what Emzar would do, but neither he nor anyone else ever learns about her change of heart.
- In most versions of Beauty and the Beast, this is the purpose of the Beast's Disney Death. Until that point, Beauty sees him as a friend but still can't look past his appearance (and in some versions is all too infatuated with a prince from her dreams – actually the Beast's true form), but nearly losing him makes her finally realize that she loves him.
- Bridge to Terabithia: Jesse has a crush on his teacher Ms. Edmunds and doesn't realize how much Leslie means to him until she dies.
- In The Difficult Child, a short story by Kir Bulychev, the protagonist at first can't stand her adopted brother – a vindictive prankster bat-like alien. Then they both grow out of it a little as she gets used to him and he becomes a bit more sociable, one time he saves her life, but still the relationship remains extremely strained. Only after the home planet of his species is found and he has to leave Earth forever they realize how strong their sibling bond was.
- The first book in the Earth's Children series ends with a non-romantic example. Brun only realizes how much he respects and cares for Ayla after she's cursed with death by Broud. As a result, he vows to protect and help raise her son.
- Harry Potter spends most of the book series despising his potions professor, Severus Snape, who treats him and his friends harshly both in and out of class. It's not until the end of the final book, after learning that Snape had secretly been working to protect him and bring down Voldemort all along that Harry comes to respect and admire Snape, and names one of his sons after Snape. However, by then, Snape had already been killed by Voldemort.
- Hollow Kingdom Trilogy: As a (mostly) human woman living in the goblin kingdom, Emily has to marry a goblin. After being turned down by her (because she was distracted by the kids she was babysitting, and because he didn't flat out say "will you marry me"), Seylin sets out to find his elf roots, because he looks exactly like an elf himself although he's a goblin. Emily is offended by this (partly because she is told that he went to find an elf bride) and claims to want to journey to find her human nature, but really to chase after him.
In her mind, she practiced the speech she would say when they met. It had changed over the course of the last few weeks. "Get married? I don't really want to marry anybody, but if I have to, I'll marry you." "Get married? If you feel that way, it's all right with me." "Get married? I'd like to— if it's with you, I mean." And now, "Where are you, for heaven's sake? Why aren't you looking for me? Seylin, don't you want to get married?"
- Honor Harrington: Hamish Alexander has no idea he's helplessly in love with the title character until she gets herself captured and (fake) executed by the People's Republic of Haven. Although she survives (something which readers know, as we see her doing it, but he doesn't), he doesn't know that, and spends two years convinced he's lost her forever. Unfortunately, by the time he learned she was, in fact, still alive, he could no longer stuff the proverbial genie back in the proverbial bottle....
- In The Hunger Games Katniss insists that she isn't in love with anyone and is mostly just confused about how she feels for Peeta and Gale. That is, until the antagonists imprison Peeta and hijack him, essentially brainwashing him into hating Katniss and wanting her dead. While the book never explicitly states the exact moment when she realizes her feelings the reader can take a guess at any moment from her stating that the loss of him has taken away her will to live to her telling him how she feels.
- In Pride and Prejudice Elizabeth didn't start to fall in love with Darcy until after she had already rejected his marriage proposal, soon after which they had parted on bad terms.
- Red Queen: Mare Barrow does not realize that she has fallen in love with Maven Calore until he has already betrayed her.
- In A Song of Ice and Fire:
- Though she is part of a loving family, Sansa Stark is the least close to her illegitimate brother Jon Snow of her five siblings. Yet, in the fourth book and after two years of being surrounded by enemies with most of her family dead or Sansa believing they are all dead, Sansa realizes how great it would be to see Jon again and believes he is the only brother remaining to her.
- Stannis had very strained relationships with his two brothers, Robert and Renly. It's only after they both die that Stannis realizes how much they meant to him, telling Jon that he loved his brothers too.
- Sylva of The Summoner Trilogy seems perfectly happy to be Just Friends with Fletcher, despite their hinted mutual attraction, up until he comes within a hair of being assassinated. The events leave her whispering a series of Little "No's" and cradling him as he bleeds out; when he ends up surviving she apparently realizes her feelings for him are definitely not platonic, as she lightly kisses him after.
- Played with in Doctor Who. When the Doctor first met River Song, she was just another archaeologist to him, but then he learned that she was from his future. After she dies in the library, he spends the next few seasons falling in love with someone he has already lost/is going to lose. Further played with in the Series 9 finale when, after Clara is killed. The climax of "Heaven Sent" built around this.
- Game of Thrones features an extremely tragic parent/child example in the fifth season. Selyse Baratheon abused and neglected her daughter Shireen for "being sinful", eventually giving her consent to let Lady Melisandre burn her alive as a Human Sacrifice to the Lord of Light. As the sacrifice gets underway, however, Selyse's motherly instincts kick in and she realizes that she can't bear to lose her. But her attempt to save her child fails and she's forced to watch Shireen burn to death. Shortly afterwards, she commits suicide out of grief and guilt.
- Orphan Black: Vic treated his ex-girlfriend Sarah like crap but he's devastated when he thinks that she committed suicide (presumably because of him).
- Our Flag Means Death: Although they were close friends, Stede doesn't realize that he's actually in love with Blackbeard/Ed until the last episode of the first season, after attempting to reconcile with his (frankly miserable) wife, and realizing that Ed was the first person he has ever actually loved. Unfortunately, by that point, Ed has taken Stede's absence as rejection, and considering he's the actual, historical Blackbeard, he doesn't take it well.
- Scrubs: J.D. was once in a relationship with Elliot, but they became Just Friends after breaking up. He's supportive when she becomes engaged to new intern Keith, but it isn't until the ceremony officiates the whole thing that he realizes that he did want to marry her himself.
- Torchwood: As Owen is dying, Tosh tells him she loves him. After he's dead (but not gone), she tries to talk to him about it but he interrupts her.
Tosh: Well, when I told you I...
Owen: Yeah, you didn't mean it. I know.
Tosh: You do?
Owen: Yes, uh ... I mean, you didn't say anything before, and then, suddenly I'm dying, and it's like, "I love you." That's not love, Tosh. That's grief. You're losing something, so suddenly you desperately desire it, textbook response.
- My Beloved Mother: Sinbell, an orphan Raised by Robots, constantly rejects and ignores his robotic mother and wonders if his "real mother" is still out there. He finally realize how much his robotic caretaker means to him after running away from home, and learning how she's his Mysterious Protector the whole time.
- The song "Let Her Go" by Passenger has this theme.
Well you only need the light when it's burning low
Only miss the sun when it starts to snow
Only know you love her when you let her go
- The song "Big Yellow Taxi" by Joni Mitchell (covered by The Neighborhood and Counting Crows, and others) has this theme. From the Counting Crows version:
I heard the screen door slam
And a big yellow taxi
Took my girl away
Now, don't it always seem to go
That you don't know what you've got
Til its gone
- Cinderella released a song called "Don't Know What You Got Till It's Gone"
- Peanuts: Lucy has a crush on Schroeder, who usually acts annoyed about it and ignores her to focus on his piano. Then Linus and Lucy move away because their father got a job in another place. At the end of one strip, Schroeder remembers Lucy leaning on his piano imagining the two of them being married, and he laments that he never even said goodbye to her. Things go back to normal after Lucy returns.
- Much Ado About Nothing: Invoked. Hero is falsely accused of cheating on her fiancé Claudio and he stops their wedding to call her a whore in front of everyone. The friar, who believes Hero is innocent, comes up with a plan to fake her death. His reasoning is that grief will make people forgive her for her alleged infidelity. In particular, he hopes to make Claudio regret publicly rejecting her. Incredibly, it works.
The Friar: She dying, as it must so be maintain'd / Upon the instant that she was accused / Shall be lamented, pitied and excused / Of every hearer: for it so falls out / That what we have we prize not to the worth / Whiles we enjoy it, but being lack'd and lost / Why, then we rack the value, then we find / The virtue that possession would not show us / Whiles it was ours. So will it fare with Claudio
- Tifa from Final Fantasy VII wasn't close to Cloud when they were young, but after he made her The Promise and left Nibelheim to join Shinra, she fell in love with him and checked the papers for him and frequently waited at the entrance of the town for Cloud to return. Unfortunately by the time they properly meet again, Tifa Cannot Spit It Out. Averted in Remake, which infers through flashbacks that Tifa did actually like him even when they were little, but Cloud back then was simply too shy to play with Tifa, due to his crush on her.
- Zidane from Final Fantasy IX only realizes that he loves Garnet after she is crowned queen (and thus becomes inaccessible for him). Before that, he's all playful and flirting but doesn't think it's for real.
- Peret em Heru: For the Prisoners: Ayuto starts out unaware of all the corners of the Love Dodecahedron he's entangled in with his friends. However, if Nei Ichikawa gets killed off by the cruel judgment of the pyramid, he realizes how he felt about them just a little too late.
- Avatar: The Last Airbender:
- Avatar: The Last Airbender:
- Zuko rebels against his uncle Iroh for most of the series, but in season 3, when they're separated because Zuko betrayed him, Zuko regrets not being more grateful and loving toward him.
- Similarly, Toph was happy to run away from her parents, but later regrets hurting them, even if they were incredibly repressive and overprotective. She has Katara write them a note apologizing.
- A darker version of this trope occurs with Azula, Mai, and Ty Lee. Azula sees people as tools or obstacles and doesn't believe in trust or friendship. However, when her friends betray her, Azula couldn't admit to herself that she really cared about them and felt hurt by their betrayal. This really takes its toll on her already fragile psyche and helps fuel her psychological breakdown.
- The Legend of Korra:
- Mako only realizes he's more in love with Korra than he is with Asami once Korra has been kidnapped by the Equalists.
- In the Turf Wars comic continuation, it's explained that this also applies to Korra and Asami. Korra realized how she felt about Asami after the poisoning, but wasn't in a state to process it. Asami realized how she felt during Korra's three-year absence, which she describes as the longest years of her life.
- Avatar: The Last Airbender:
- The Dragon Prince: Rayla didn't realize she had fallen in love with Callum until she thought she might lose him, after his use of dark magic put him in a coma at the end of season 2.
- In the Superman: The Animated Series episode "Brave New Metropolis", Lois encounters a horrifying alternate Metropolis in which Superman went Knight Templar after failing to save this world's Lois Lane. This Superman explains that he wasn't aware he felt that way about her until after she died.