broken hearted

I feel really bad about myself. I've been trying to ignore it by keeping busy and saying he's such an asshole to there but not me. Just to keep myself from tjinking about how we ended. I know I can do better and I want better but he told me "we have too many differences". I thought that was a good thing in my opinion. I would get have an open mind on other things that he had liked and I didn't. And I see him everyday at school because we have the same friend group and it's the worst thing ever. I'm truly heartbroken and don't know what to do. Help please?