As much as fiction loves its LoveTropes, some people are not so lucky (or they might be, [[AllergicToLove depending on]] [[LoveIsAWeakness your point of view]]). This index collects all the tropes for characters who have never been in a relationship, have been in a recently ended one, try their best to ''avoid'' being in one, or just can't end up in one despite their best efforts, and the reasons thereof.

Prime targets for TheMatchmaker and the ShipperOnDeck -- indeed, most of these people are also {{Love Interest}}s. Compare ChasteTropes, LoveTropes, WeddingAndEngagementTropes, LoveInterests, TheExIndex.
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!!People
[[index]]
* AbhorrentAdmirer: They're single because their crush finds them disgusting.
* AllegedlyDateless: Despite having dated people in the past, this character is treated as though they can never have a relationship.
* AloneAmongTheCouples: The character is single while everyone else is in a relationship.
* AmicableExes: Formerly in a relationship.
* ArmoredClosetGay: They would be in a relationship if they weren't hiding their true sexuality.
* BlackWidow: Enters into many relationships, but gets rid of them just as quickly.
* TheBluebeard: The SpearCounterpart to Black Widow.
* TheCasanova: Strings along many love interests, but is not in a serious relationship with any of them.
* CasanovaWannabe: They try to be TheCasanova, but they fail miserably.
* CelibateEccentricGenius: A brilliant person who's more in love with their life's work than with the opposite sex.
* CelibateHero: The hero chooses to be single.
* ChasteHero: The hero is clueless about romance.
* CollegeWidow: Her husband is dead, so she shags college-age men to fill in the void.
* ConfirmedBachelor: This person refuses to ever get married.
* CourtlyLove: The state of being in love but not actually wanting or expecting to couple up with a LoveInterest.
* CrusadingWidow: Their spouse/lover was killed, and now they're on a quest to avenge them.
* DidNotGetTheGirl: The hero doesn't end up with their LoveInterest.
* DoggedNiceGuy: A character who hopelessly pines after someone who made it clear that they don't like them romantically.
* EverybodyIsSingle: [[ExactlyWhatItSaysOnTheTin Everybody in the story is single.]]
* GlamorousSingleMother: A woman who manages to take care of herself and her children really well despite being a single mother.
* HopelessSuitor: This person has no chance of winning over their crush.
* TheIngenue: Usually starts out as this.
* InsecureLoveInterest: A character who feels they have no chance of ever being good enough for love, so they don't bother trying to find a partner.
* LadykillerInLove: TheCasanova falls genuinely in love, but his previous womanizing ways are liable to scare away his potential love.
* LookingForLoveInAllTheWrongPlaces: A character has had many failed relationships.
* MaidenAunt: She never married or had kids of her own, so she dotes on her niece/nephew instead.
* OldMaid: An old woman who has never married.
* PrinceCharmingWannabe: He arrogantly believes himself to be the perfect guy for a woman who can't stand him.
* RomanticWingman: This person helps out their friend in their love life, though they may not be in a relationship themself.
* RunawayBride: A bride to be who ditches her groom at the altar.
* RunawayFiance: They ran out on an ArrangedMarriage.
* SerialRomeo: He believes every girl he meets to be his OneTrueLove, but never ends up with any of them.
* SingleMomStripper: A single mother who works in sex trade to provide for her children.
* SingleParentsAreUndesirable: Single parents have difficulty dating.
* StrugglingSingleMother: A single mother who struggles to make ends meet.
* TrulySingleParent: They had a child without the help of a mate, usually through magic or a labratory experiment.
* UnluckyChildhoodFriend: They don't get a RelationshipUpgrade with their childhood friend.
* UnrequitedTragicMaiden: She can never have the man she's pining after, and suffers a sad fate for it.
* YouNeedToGetLaid: When a person's crankiness/obsessive behavior is suspected to be due to being single.
[[/index]]

!!Possible reasons
[[index]]
* AllLoveIsUnrequited: Their crush doesn't return their feelings.
* AllergicToLove: Love literally makes them ill.
* CommitmentIssues: They're afraid of settling down with a spouse.
* DoesNotLikeMen: She refuses to have anything to do with men.
* TheFirstCutIsTheDeepest: They got their heart broken from a previous relationship.
* HeManWomanHater: He refuses to have anything to do with women.
* IDidntMeanToTurnYouOn: They unintentionally arouse someone they weren't trying to arouse.
* IDontWantToRuinOurFriendship: They refuse to get in a ChildhoodFriendRomance on the grounds that doing so will destroy their friendship.
* ItsNotYouItsMe: They break off a relationship due to feeling unworthy of that person.
* ItsNotYouItsMyEnemies: They can't stay with their lover because doing so puts them in danger.
* JustFriends: The prospective couple only likes each other as friends.
* LikeBrotherAndSister: The prospective couple sees themselves more as siblings rather than lovers.
* LoveIsAWeakness: Believes that love is nothing but a hindrance.
* MarriedToTheJob: They're much too devoted to their career to find time to date.
* TheMourningAfter: The love of their life has died, so they're too grief-stricken to love again.
* ObliviousToLove: They're too clueless to notice that someone's in love with them.
* ParalyzingFearOfSexuality: They want a relationship, but believe that SexIsEvil.
* SillyRabbitRomanceIsForKids: They've been soured on the idea of love.
* SleepsWithEveryoneButYou: They're the only one that even someone who ReallyGetsAround won't screw.
* SuperheroesStaySingle: Superheroes are not allowed to have stable romantic relationships or get happily married.
* TerriblePickUpLines: Cannot flirt without annoying/creeping out the other party.
* VirginPower: They have powers that they'll lose if they engage in sex.
* VowOfCelibacy: They are required, often for religious reasons, to abstain from relationships.
* WidowMistreatment: They are treated poorly because of the death of their spouse.
[[/index]]
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