I dont want to go back to school on my last year theres a girl whos really tormenting me?

I have the same situation with a boy I used to like. He found out and our friendship ended completely. He ignored me for a while then just started being a jacka.s.s. I have so much anger bottled up from him now. He has no reason to hate me, I never did anything to him. So I told myself, if he says one thing to me this year, one thing, i'm going to yell at him and get all my anger out at him so he will realize how much everything he did to me hurt.