allright.the same shit happened to me too.I stuck to a girl even though she wanted to be just friends,because i thought someday it might change.I gave it a shot 4 or 5 times....everytime,i was heart broken.
but what really broke me was when she started dating another guy.Hell,for 2 years,i was with her trying to win her feelings and here comes a stranger whom she likes.that hurt the most.It bled.
Damn,before something like that happens,forget her..dont be friends any more it will only hurt you later.
The best way out of this mess is to start dating other girls.that is ithe best and the only way to be happy.
bye and godspeed.