From Longman Dictionary of Contemporary Englishunrequitedun‧re‧quit‧ed /ˌʌnrɪˈkwaɪtɪd◂/ adjective unrequited love or other strong feeling is love etc that you feel for someone but that they do not feel for you
Examples from the Corpus
unrequited• And I really can't wait around to find out if I suffer unrequited love.• In 1988 there were several well-publicised cases of young people committing suicide apparently because of unrequited love.• Anyway, the story never aired on the news, leaving our observers with a painful case of unrequited news lust.• I fully realized the futility of this enterprise, an unrequited obsession, a one-sided infatuation. 