Ok so I'm assuming it was in the 80s but its about this short-haired girl (who is beautiful but keeps looking at long haired extra booby girls and feeling down about herself of course) who likes her dude friend but he likes this other girl so she helps him get her. But then at the very end he realised he doesn't like her and infact, of course, likes his friend. I think there was something earing related too.
Anyway, ringing any bells? I cant remember what it was called!