A ComedyTrope where 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 StalkerWithACrush, although they will deny that they are any such thing. They will also become a GreenEyedMonster if they see their "boyfriend/girlfriend" anywhere near another boy/girl, [[FacePalm even though they have no legitimate claim to the person.]] For maximum comedy, the object of their "love" may find themself dragged out on a date against their will.

Can be TruthInTelevision. 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.

Compare ClingyJealousGirl, CrazyJealousGuy and StalkerWithACrush. Contrast SheIsNotMyGirlfriend. Also, this kind of behavior is typical of the {{Yandere}}.
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!!Examples:

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[[folder: Anime And Manga ]]

* BY average, there's at least one per UnwantedHarem series.
* Boa Hancock from ''Manga/OnePiece'' claims to be Luffy's soul mate, despite the fact [[IdiotHero Luffy]] has [[ObliviousToLove never shown]] [[ChasteHero 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. [[spoiler: It's also a hint of her DarkAndTroubledPast, which started [[BreakTheCutie breaking]] [[JerkAssWoobie 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 [[BecauseYouWereNiceToMe who was kind to her]].]]
* Tokiwa from ''AskDrRin'' plays this trope for drama [[spoiler:while he's possessed]].
* Megumi "Nodame" Noda from ''NodameCantabile'', 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 [[{{Tsundere}} Chiaki]] mostly thinks of her as a pest outside of being a genius pianist. [[spoiler: 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.]]
* ''Anime/YuGiOh'', [[BrattyHalfPint Rebecca]] [[ClingyJealousGirl 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 [[LuminescentBlush blush]] and Anzu [[GreenEyedEpiphany jealous]] if nothing else.
* ''Manga/RanmaOneHalf'': Tatewaki Kuno, poor deluded fool, is this for any woman he has the slightest interest in.
* ''Manga/DeathNote'': Immediately after ''meeting'' Light, Misa declares herself to be "his girlfriend." Lampshaded in the dub:
-->'''Misa:''' "Light-darling!"
-->'''Light''': "D-did you just call me ''darling''?!"
** Of course, this quickly becomes a very dark example, considering [[ManipulativeBastard who]] [[SerialKiller Light]] [[ItsAllAboutMe is]] and what becomes [[LoveMakesYouCrazy of]] [[LoveMartyr Misa]].
* ''LightNovel/BakaAndTestSummonTheBeasts'': Shouko is this to Yuuji. [[spoiler:Considering [[LonelyRichKid their]] [[OnlyFriend shared]] [[BecauseYouWereNiceToMe past]], however, things aren't as easy as they seem.]]
* ''Webcomic/AxisPowersHetalia'': Sweden once said that Finland was [[HoYay "my w'fe"]], much to Finland's shock.

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[[folder: Comics ]]

* ''ComicStrip/{{Peanuts}}'': Sally is like this towards Linus. "I am NOT your sweet Babboo!"

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[[folder: Fan Fic ]]

* From time to time in FanFic/TheVinylAndOctaviaSeries, 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!”

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[[folder: Film ]]

* Stuntman Mike from ''Film/DeathProof'' seems to have this for his victims, but he's a serial killer, and his feelings weren't PlayedForLaughs.
* In ''Film/SinginInTheRain'', 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.
* The romantic comedy ''Film/WhenInRome'' ''runs'' on this trope with several suitors enthusiastically chasing the protagonist around.
* The French film ''À la folie pas du tout'' (in English, ''Film/HeLovesMeHeLovesMeNot'') features Creator/AudreyTautou 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.
* Eddie Brock has this opinion of his 'relationship' with Gwen Stacy in ''Film/SpiderMan3''. Gwen comments that all they've done is have coffee together.

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[[folder: Live Action TV ]]

* ''Series/WizardsOfWaverlyPlace'' 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.
* [[HopelessSuitor C.C.]] [[RichBitch Babcock]] on ''TheNanny'' 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.
* PlayedForDrama on ''{{Series/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.

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[[folder: Video Games ]]

* ''Franchise/SonicTheHedgehog'': [[{{Tsundere}} Amy Rose]] is this to Sonic.
* ''VideoGame/TheKingOfFighters'': In some continuities, Kensou refers to himself as Athena's boyfriend. Athena doesn't agree.

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[[folder: Western Animation ]]

* Panini is this towards the title character on ''WesternAnimation/{{Chowder}}''. [[spoiler:The DistantFinale has them eventually married.]]
* In an episode of ''WesternAnimation/SupermanTheAnimatedSeries'', 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 ''TotalDrama,'' [[LoonyFan Sierra]] is definitely the StalkerWithACrush type, first to [[DoggedNiceGuy Cody]] and later to [[BlackAndNerdy 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 [[InvokedTrope invoke]] an AccidentalMarriage on him.

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[[folder: Real Life ]]

* Famously, a guy named John Hinckley, Jr. had an erotomanic delusion involving Creator/JodieFoster. It led to him shooting RonaldReagan to "impress" her.

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