Annoyed at myself

Recently I have realised how much I live in the past. I'm so hung up at what's already happened, that my life has come go a complete standstill. I think this is because of a boy at school that I was just such good friends with, best friends even. I still remember the first day I ever met him. We were so close and he was one of the only people I could trust, we used to spend so much time together and we just had such good times. We never put a label on our friendship, but I could tell there was something more between us. He started dating my best friend and then it hit me how much I actually liked him, us three were just involved in a vicious love triangle, and it didn't end well they broke up and me and her are no longer friends. Which to be honest I'm not too bothered about, but since I've left school and started college me and him have hardly spoken. We've just lost contact and our complicated relationship didn't stop as such just simmered away... We never spoke about "us" anymore it was never resolved it was just left. I have seen him a few times since college and things just felt so normal, like nothing ever happened. I still see him as my best friend who I fell for. I can assure you the feelings not mutual as he has a girlfriend. It just hurts a lot knowing I don't mean anything to him anymore.I don't really know what we are. It sounds so cliche but I've never liked anyone like him and I just sit hoping that one day he will remember me and what we had. I can't help but think what might of been. Of course I'm happy he's happy but I just can't help but hope that one day he will realise what was right there all along. I hate talking about him with my friends because they will tell me to grow up move on, stop living in the past, he's moved on, stop being pathetic. But right now I just don't think I can. I just miss everything about him, his hugs were always the best, they were just perfect, they always made feel better and happy to have him. I'd give anything right now just to hug him.The majority of my friends have boyfriends or that special guy they are texting everyday and here's me hoping some boy from school is gonna suddenly come back into my life! At this rate I don't think I will ever find someone as good as him.. Forever alone.