It seems like this man doesn't think of love in the same way as you do. He obviously hasn't properly dealt with or gotten over his past, and it's affecting him and everyone around him. He needs a therapist. Despite however much you loved him, you will be equated with all the other people in his life who were suppose to love him. In my opinion the best you can do is help him find a therapist and be a friend to him, because until he works out his issues he wont be able to have a healthy loving relationship.