Will I always feel angry? What should I do?

You will have to figure out a way to exercise your anger or it will eat you up. Try writing it down and getting it all out will help some. You are doing the right thing by not speaking to him because it might cause you to have a big blow out and then he will think you still want him. The best way to get people back is indifference. When he figures out that you are okay with out him. That will bother him.