Sorry he hasn't changed for the better. There isn't anything you can do. He's just going to do what he wants. He's got you cast as the wicked witch of the west. So you are doing the right stuff by washing your hands of him as much as possible. You've done a great job getting a life and growing stronger every day. So just turn your back and go on....you've got much better things ahead. The kids will struggle through too.
