WordNet (r) 3.0 (2006):

love story
    n 1: a story dealing with love [syn: love story, romance]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "love story":
   Marchen, Western, Western story, Westerner, adventure story,
   allegory, apologue, bedtime story, detective story, fable, fabliau,
   fairy tale, fantasy, fiction, folk story, folktale, gest,
   ghost story, horse opera, legend, mystery, mystery story, myth,
   mythology, mythos, nursery tale, parable, romance, science fiction,
   shocker, space fiction, space opera, suspense story, thriller,
   whodunit, work of fiction