What would you do iff?

alright well, if there's a guy you like and you do soooooooo much for him and he doesn't care, but all he does is stare at you every minute, which keeps you liking him and you guys have NEVER talked! and all he does his break your heart by talking to other girls and going into new relationships what would you do?? oh and you've liked this guy for 2 and a half years!