In a perfect world, we would all still be best friends with people after we break up with them, but that is not the case in most circumstances. If he hates you, then that just re-enforces the fact that you are broke up for a reason. The best thing about this is that you no longer HAVE to concern yourself with him UNLESS you choose to. So I say stop worrying about what he thinks about you or anything for that matter :)
Ignore him. That means no stalking, no texting, no smiling across the cafeteria, no asking your friends to go talk to him or talking to his friends to see what he said. Don't torture yourself by trying to be friends with him. He will just dislike you more. Move on, if for nothing else, do it for your own psyche. Pretend like he never existed and still doesn't. And DON'T talk to your girlfriends about your heartbreak... Younger girls have a tendency to try to make things better and they will run up to him and tell him how bad he hurt you and he should talk to you, that will make him mad at YOU! Talk to your mom if you have to get it off your chest.
if he doesnt talk to you or he doesnt like you dont even worry about him... there are plenty of other guys out there that probably want you but you just dont know.. not every guy is going to tell you when they like you so just dont worry about him he is a waste of time