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 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.
- 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.
- 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?!"
- Urabe Rika from Inazuma Eleven claims she is in a romantic relationship with Ichinose Kazuya, whom she always calls "Darling" but doesn't realise 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.
- 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 is seems to be affecting her pretty badly. She interprets even the vaguest, most non-chalant 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.
- Ranma ˝: Tatewaki Kuno, poor deluded fool, is this for any woman he has the slightest interest in.
- 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).
- 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.
- 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.
- 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 as a very jealous wife.
- Momiji Oouka from Detective Conan was introduced telling herself that she will marry Heiji Hattori. The 21th movie is supposed to focus on her, Heiji and Kazuha's potential Love Triangle, and according to the trailer, it looks like she made a Childhood Marriage Promise with him years ago.
- 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.
- 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.
- Peanuts: Sally is like this towards Linus. "I am NOT your sweet Babboo!"
- 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!�
- 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.
- The French film À 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.
- 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.
- 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 Millenium Falcon at the time.
- 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 in trying to convince her, proving himself, and challenging Henry for her hand.
- 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.
- 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.
- 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.
- 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 longterm 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.
- The King of Fighters: In some continuities, Kensou refers to himself as Athena's boyfriend. Athena doesn't agree.
- 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.
- Phoenix Wright: Ace Attorney: Trials & 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, is not in love with him and is in love with someone else. Larry repeats that 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.
- Panini is this towards the title character on Chowder. The Distant Finale has them eventually married.
- In an episode of Superman: The Animated Series, 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 Superman to marry her, and not quite understanding 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.
- 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.