Ichinose: Boyfriend?! We just met a few moments ago.
One character claims that they are someone else's love interest, even though the two are not actually in love, dating, or (in extreme cases) even anything more than casual acquaintances. This character may exhibit traits of Stalker with a Crush, although they will deny that they are any such thing. They will also become a Green-Eyed Monster if they see their "boyfriend/girlfriend" anywhere near another boy/girl, even though they have no legitimate claim to the person. The object of their "love" may find themselves dragged out on a date against their will.
Can be Truth in Television. The psychological disorder called Erotomania causes an extreme manifestation of this trope wherein the afflicted individual comes to believe that a specific person is in love with him/her and acts based on that belief. The fixation can be triggered by something as innocent as a smile from the person as they pass the afflicted individual on the street.
Compare Mad Love, Clingy Jealous Girl, Crazy Jealous Guy, Yandere, and Stalker with a Crush. Contrast She Is Not My Girlfriend. See also Loving a Shadow, The Dulcinea Effect. Likely to overlap with Abhorrent Admirer.
- Tokiwa from Ask Dr. Rin! plays this trope for drama while he's possessed.
- Axis Powers Hetalia: Sweden once said that Finland was "my w'fe", much to Finland's shock.
- Baka and Test: Summon the Beasts: Shouko claims Yuuji is her husband and not even Yuuji is allowed to say anything to deny it. Considering their shared past, however, things aren't as easy as they seem.
- A running gag on Black Jack has Pinako proudly claim the titular doctor is her husband and she his wife. Depending on the adaptation, he himself sees Pinako as either a daughter or just an assistant. This isn't helped by the fact that she's mentally 18, but her body is that of a little girl's because the mass she had left could only afford her that kind of body in an operation.
- Death Note: Immediately after meeting Light, Misa declares herself to be "his girlfriend". Of course, this quickly becomes a very dark example, considering that Light is a manipulative selfish Serial Killer and how unstable and devoted Misa becomes. Lampshaded in the dub:
Misa: "Light-darling!"Light: "D-did you just call me darling?!"
- Momiji Oouka from Detective Conan was introduced telling herself that she will marry Heiji Hattori. The 21st movie is supposed to focus on her, Heiji and Kazuha's potential Love Triangle, and she claims he made a Childhood Marriage Promise with her years ago (but turns out it is a misunderstanding)
- Kagura from Fruits Basket insists that she and Kyo are engaged and generally treats him as though she's already her boyfriend, but that's only because she threatened Kyo to agree to a Childhood Marriage Promise when they were children (with a knife in the manga and 2019 anime and with a boulder in the 2001 anime). Even when Kyo denies it and tells her to stop insisting they're a couple, she'll respond with either tears or violence.
- Kouko was this to Mitsuo at the beginning of Golden Time because they were childhood friends and used to live near each other, she decided on her own that they were in love, and destined to be with each other. Because of this, she had been following him for years to make sure their lives would go perfectly according to the little scenario she had formulated in her mind. He gets her to stop this after a serious talk in episode 4.
- The Heroic Legend of Arslan has Alfarid, who declares herself to be in love with Narsus shortly after he rescues her from bandits. He's ten years older than her and not interested in the least, but unfortunately for him, Alfarid doesn't really care, and regularly introduces herself as his wife anyway. His efforts to clear up the misunderstandings that ensue are not always successful.
- Urabe Rika from Inazuma Eleven claims she is in a romantic relationship with Ichinose Kazuya, whom she always calls "Darling" but doesn't realize he's not interested in her. She also doesn't believe Kogure when he tells her in his usual rude way that this kind of relationship doesn't exist between them.
- Infinite Stratos: After weeks of hating Ichika and even attacking him with deadly force on several occasions, Laura does a complete 180 in personality when she rescues Ichika from a Clingy Jealous Girl, kisses him, and declares him to be her wife. The next morning he wakes up to find her naked in his bed. However, after he gets used to the idea of Laura not wanting to murder him, he treats her much the same as his other love interests.
- Haru from Katekyō Hitman Reborn! fell in love with Tsuna after he saves her from drowning in a river. Ever since then, she always proclaims that she wants to marry Tsuna. And she likes to proclaim that she wants to be a mafia boss' wife, not really knowing its implications and that Tsuna is really going to be a mafia boss. Tsuna always shots her down and Gokudera is really against it, but not because he likes her, mind you.
- Marika in Nisekoi not only claims that she's Raku's fiancée but also that he agreed to it when they were younger. When we get a flashback not long after, it's obvious that she's making it up: The closest he got to agreeing to marry her was telling her that he likes girly girls with long hair, after which she grew out her hair and taught herself to speak in an archaic rich girl style instead of her country bumpkin accent. She did get her father to ask Raku's father to have them betrothed, but Raku himself was completely uninvolved in this decision and he never seriously considers going out with her or returning her feelings. Given the implications that she remembers more of what happened ten years ago than anyone else, she seems to be hoping that he'll mistake her for the actual childhood marriage promise girl whose identity he can't clearly remember.
- Megumi "Nodame" Noda from Nodame Cantabile, so much. She actually declares herself Chiaki's wife, and some people take her seriously, but they're actually just neighbors and members of the same orchestra, and Chiaki mostly thinks of her as a pest outside of being a genius pianist. She pretty much hangs around him so much that eventually he stops correcting people that she's not his girlfriend, and even starts referring to her as his girlfriend and eventually they get married.
- Boa Hancock from One Piece claims to be Luffy's soul mate, despite the fact Luffy has never shown even a passing romantic interest in her. Elder Nyon mentioned that Hancock is under some sort of "love sickness," and whatever it seems to be affecting her pretty badly. She interprets even the vaguest, most nonchalant show of affection or camaraderie from Luffy as a sign that he's her husband and that they are meant to be together for eternity. It's also a hint of her Dark and Troubled Past, which started breaking Hancock when she was just 12 years old — deep down, the powerful Amazon Queen is still an emotionally-stunted young girl... and Luffy was among the first non-females who was kind to her.
- In an episode of Pokémon, Shauna, the Girl of the Week, introduces herself as the girlfriend of Dewford Gym Leader Brawly. Naturally, Brawly knows nothing of this when he shows up, but he takes it in stride.
- This is the defining trait of the Kuno siblings in Ranma ½: both Tatewaki, and his subsequently introduced sister Kodachi, fixate upon a character that they find physically attractive and promptly declare themselves to be head-over-heels in love with them, regardless of that character's say in the matter. Tatewaki is introduced as this for Akane Tendo, but also becomes this for Ranma Saotome's female form after she beats him up in Ranma's first duel with him. Kodachi, meanwhile, falls head-over-heels for Ranma Saotome after he saves her from a nasty fall... that he inadvertently caused by accidentally hitting her in the head with a kettle whilst they were both Roof Hopping. In both cases, they steadfastly ignore that the objects of their affection repeatedly and vehemently insist that they're not interested in dating them, with Tatewaki in particular routinely being pounded by his two "lovers" for his lechery.
- Soul Hunter:
- Tou Sengyoku decides on her own that she and Dokuson are engaged after falling in Love at First Sight with him. He doesn't particularly seem to dislike her but doesn't like her very strong pursuit of him and mild Yandere tendencies.
- Venus is certain that she is Taikoubou love interest. She is, at best, an Abhorrent Admirer.
- Mizore Yukihiro from UQ Holder! declared Touta to be her husband when they first met. Unfortunately for her, she's the only one in his harem that he doesn't have any feelings for (as revealed when he accidentally took a truth potion).
- Lum in Urusei Yatsura may be the most famous example: when Ataru saved the world from an alien invasion by beating her in a game of tag and shouted he could now marry (his then-girlfriend Shinobu, but he didn't say that) Lum decided he wanted to marry her, and started acting like a very jealous wife. Zigzagged in that Ataru does actually grow to reciprocate her feelings, to a degree as the series progresses.
- Yu-Gi-Oh!, Rebecca Hawkins started claiming that Yugi was her "boyfriend" during her second appearance and kept it up through the end of the series. She at least managed to make Yugi blush and Anzu jealous if nothing else.
- Peanuts: Sally is like this towards Linus. "I am NOT your sweet Babboo!"
- The Legend of Wonder Woman: Etta claims the attractive Ace Pilot Lawrence Stone has a crush on her after she flirts with him. At first, it seems to just be more of her loud cheerful proclamations that are unfounded in reality later it is revealed that he does actually reciprocate her feelings, though no relationship is started between them before the book's cancellation. Probably because of the reactions and prejudice they would face as a white Texan woman and an African American man trying to date in the 1940s.
- Big Nate: It's a running gag that Nate, a self-proclaimed KidAnova, believes that casual acquaintance Jenny has a massive crush on him that she's simply repressing, and he's determined to draw it out. He's been trying to make her his girlfriend since kindergarten. But since (1) Jenny wants nothing to do with him and (2) Nate's romantic schemes tend to backfire horribly, he hasn't yet succeeded.
- From time to time in The Vinyl And Octavia Series, Vinyl will claim that Octavia is secretly hot for her or something similar.
"Can you believe this mare, Octavia?" Vinyl laughed. "Just because you'd totally do me, she thinks that we're in a relationship!"
- In Barbie and the Magic of Pegasus, Wenlock introduces himself to Princess Annika as her "future husband", much to her outrage. She is quick to reject his marriage proposal, so he tries to force her into it by turning her parents and some of her people into statues and threatening to leave them that way.
- The French film A la folie pas du tout (in English, He Loves Me... He Loves Me Not) features Audrey Tautou as an erotomanic who displays this behavior towards a happily married doctor who is barely aware of her existence. She takes his rejection about as well as you might expect.
- Stuntman Mike from Death Proof seems to have this for his victims, but he's a serial killer, and his feelings weren't Played for Laughs.
- In The Force Awakens, Maz Kanata refers to Chewbacca as her 'boyfriend' (albeit not entirely seriously). What Chewie thinks about the situation remains a mystery as he's preoccupied elsewhere, fixing the Millennium Falcon at the time.
- In Singin' in the Rain, the in-story main couple are rumored to be together—and Lina goes along with this because she read it in the tabloids. A few scenes are devoted to Don trying to convince her it isn't true.
- Eddie Brock has this opinion of his 'relationship' with Gwen Stacy in Spider-Man 3. Gwen comments that all they've done is have coffee together.
- The romantic comedy When in Rome runs on this trope, with several suitors enthusiastically chasing the protagonist around.
- Played dead serious with The White Queen in The Unexplored Summon://Blood-Sign, who sees herself as already being married to Kyousuke, despite the latter hating her to the point of devoting his life to killing her. The Queen refers to their past together as their "honeymoon" and calls Kyousuke's father "Father".
- He only lasted one Charmed episode, but a fellow half-whitelighter once came to claim Paige as his wife. He'd gotten advice from several fortune tellers that the two belonged together and wouldn't take no for an answer until Paige gets engaged to her actual love interest, Henry, though he doesn't do anything to force her into love or marriage. He seems content with trying to convince her, proving himself, and challenging Henry for her hand.
- Played for Drama and Deconstructed in Crazy Ex-Girlfriend. Rebecca sees herself as Josh's true love and moves across the country for him — if only he'll dump his long-term girlfriend for her! However, her obsession with him and insistence that they're meant to be causes great damage to her interpersonal relationships and is increasingly implied to be (before it is outright confirmed) a manifestation of deeper mental problems.
- Played for Drama on Dexter, when a murder victim's "girlfriend" turns out to be a stalker who killed him in a rage because he didn't return her feelings.
- Summed up well in the brief song "Romantic Moments": Romantic moments you had that he didn't know were romantic! / Or maybe he did a little, we're not really sure? / But most likely not
- Played for Laughs on House of Anubis in the second season, when Amber continuously insisted she and Alfie were still dating despite Alfie having broken up with her. This is because she wanted the power over when they broke up and refused to accept that she'd been dumped. Gets a bit less humorous when she uses this "relationship" to make him go into the creepy tunnel for her when she drew the short straw, where he has a claustrophobic freak-out.
- Hank from the Midnight Caller episode "Twelve Gauge" is convinced that his ex Arden was the love of his life, but cruelly dumped him. Turns out she was only his physical therapist, and the two were never in a relationship at all.
- C.C. Babcock on The Nanny sees herself as the only woman in Maxwell Sheffield's life, rather than Fran Fine, even though Maxwell sees her as nothing more than his business partner.
- Wizards of Waverly Place had Harper dabble in this trope for a few seasons with Justin before moving on to Zeke. She would routinely talk about her (imagined) relationship with Justin and claim that any other girl Justin dated was only a temporary fascination and that he would eventually find his way back to her.
- In Lost Girl's fifth and final season, Tamsin enters into a Friends with Benefits relationship with Bo that eventually leads her to believe that she, not Lauren or Dyson, is the love of Bo's life. Bo tries her best to break it to her gently, but the truth still crushes Tamsin and leads to a severe slump in their friendship, at least for a while.
- Erotomania comes up from time to time in Criminal Minds. It's identified by name in "Broken Mirror" in season one. Season three's "The Crossing" also features an erotomanic stalker. Season seven's "Proof" and season eleven's "'Til Death Do Us Part" both feature characters who believe themselves to be in a relationship with their sibling's partner (brothers and a wife in the former, sisters and a boyfriend in the latter), though the unsub in "Proof" at least seems to be aware that it's wishful thinking on his part.
- Zelda Gilroy is this to Dobie Gillis in The Many Loves of Dobie Gillis. She mostly proclaims this status to him due to proximity. Dobie usually finds her annoying and doesn't consider her his type, though they do become closer when she learns to be a bit less pushy and he comes to appreciate the ways she helps him out.
- The King of Fighters: In some continuities, Kensou refers to himself as Athena's boyfriend. Athena doesn't agree.
- Phoenix Wright: Ace Attorney - Trials and Tribulations: Larry Butz is one for Iris, declaring that they're in love and that they're going to get married. Iris doesn't even notice that he has a crush on her, until Edgeworth spells it out for her, Iris is interested in him but she does loves someone else. Larry does it again in Phoenix Wright: Ace Attorney Spirit of Justice with Ellen, declaring that he'll marry her even though she was about to marry someone else.
- Sonic the Hedgehog: Amy Rose is this to Sonic. She constantly tries to marry him, flirts with him, and is presented as a Stalker with a Crush in many early 3D Sonic titles. Sonic himself isn't interested in romance, but likes her as a friend.
- In the xkcd strip "Friends," the main man goes into a very long speech about why he thinks he would be the most ideal boyfriend for the lady he's talking to. It ends with the lady saying "I'm going to date this jerk."
- Panini is this towards the title character on Chowder. The Distant Finale has them eventually married.
- The Kanker Sisters from Ed, Edd n Eddy each have a crush on one of the three Eds and will constantly call them their "boyfriends". They continuously bully the Eds with their affections, physically assaulting them and restraining them before showing them in unwanted kisses, making it clear they are trying to force the Eds into a relationship with them whether they want it or not.
- From Miraculous Ladybug, Chloe considers herself to be Adrien's girlfriend and takes every opportunity to display her affection towards him. Adrien himself regards her as a friend at best—and at worst, a way too clingy annoyance.
- Superman: The Animated Series:
- In an episode, Superman frees a female Kryptonian named Mala from the Phantom Zone. After a while, she starts getting jealous of Lois Lane and, when a reporter asks Superman and Mala if they're a couple, Mala immediately says "yes" and is enraged when Superman disagrees.
- There was also Maxima, who wanted to marry Superman and did not quite understand why he didn't want to marry her, being used to always getting her way.
- On Total Drama, Sierra is definitely the Stalker with a Crush type, first to Cody and later to Cameron (mostly because Cody wasn't around and she kept hallucinating Cameron as him). Aside from putting Cody through hell and getting violently jealous/protective, she once tried to invoke an Accidental Marriage on him.
- Infamously, a guy named John Hinckley, Jr. had an erotomanic delusion involving Jodie Foster. It led to him shooting Ronald Reagan to "impress" her.
- Moby claimed having dated Natalie Portman when they were younger. She revelead that she never considered their relationship as dating and that she had in-fact a bad image of him.