It's been a while

It's been a while, I've been busy doing so many things leaving school and having the prom, attending the prom after party and getting absolutely off my face, telling the guy I like that I like him, meeting up with him, realising he has a girlfriend so nothing can really happen between us. I hate him in a way, he makes me feel bad because he has a girlfriend, he told me he dislikes her, but now after saying he likes me and getting my hopes up by saying he would break up with her he is trying to make it work with her. He said he wanted to come to my birthday party, so I got really excited about it, then he texted me on the day an hour after it started saying he couldn't really be bothered coming so he didn't. Why are guys such dicks, Then he trys to make me feel as though it's my fault, it's so annoying. And I'm supposed to be revising for my GCSEs but I'm not haha!