The betrayers are battling tremendous loads of guilt, shame and depression. After what you have been through though it is hard to make that matter. Please know that everyone here understands what you are feeling and that we are here for you to vent those feelings to. I think in time your feelings will change. He didn't get away with anything but hurting everyone in your family and shaming himself.
People can learn from their mistakes.
People here are right, he's probably hurting in his own way and feeling his own kind of pain. I know there isn't a day that doesn't go by without him saying to me that he wished he had never hurt me in this way. I don't want vows from him, they hurt too much and are too easily broken. But the thing is that I will be here in 20 years and see it then. I know he believe he means them now, and that's whats important.