Make your past experiences a guidepost, not a hitching post....
Your subconcious mind is the controller of both your emotional well being and physical well being. Every night, and I mean every, before you go to sleep send your subconcious mind a message...I forgive XYZ, I have moved on from XYZ, I do not want this person to hold me prisoner any longer....something to that effect. Before you know it, your concious mind will accept the thought and it will become reality...
It works, give it a go.