Most Helpful Guy
The anger is there because you have not forgiven him. Most people do not realize that forgiveness sets them free, and has little to do with the person they are forgiving. Until you can do that, then you will continue to hold onto the anger... which is like holding onto a burning rock... while he just gets on with his life.3
Most Helpful Girl
I think, the best way to get back at an ex that did your wrong is showing him how Happy you are WITHOUT him. Right now, you're showing him the anger there is in your heart. If I were you, I would unblock him, and go to places he might be with friends. Show him how much fun you're having WITHOUT him.
You probably have unanswered questions as to why you guys broke up?