Mucked this one up...

So when I first joined my school there was this guy who was really nice to me and we got on really well. He told me he fancied me and i really fancied him. We went on a camp and he went out with this other girl and just shoved me out. I still havent forgiven him and it was about a year ago. I always ignore him and refuse to talk to him, hi-fives or anything.
Should I forgive him?????
I think i am being stupid....
thanks