You have to realize that people change. In this case, they change for the worse. If you still really want to be friends with him, try talking to him. Ask him about the time that you didn't talk to each other, and ask to be his friend.
If he's still a jerk to you, you don't need him. But whatever you do, don't start another fight by telling him off. That would be causing a whole new problem...
Good luck!