He sounds like an ***hole no ofencse but you need to find someone who will NEVER hurt you in the way he has hurt you. I have been hurt in the same way you are hurt in. My ex-g/f hurt me in a worse way though, she cheated on me when I was gone for a month and a half. Not once but twice. Then before school started, then with her best male friend. I know the pain you feel pretty much. But I have found the best way to get back at people is to be strong and move on, I hope this has helped in some way.