I think he's just in over his head and doesn't know how to deal with it. He doesn't know how to be any different than he is. Let him go to do his thing. If he comes back don't let him in, make him earn his way. It was too easy for him this time he didn't have to prove anything or show you things had changed. He was just back home. But, I'm getting way ahead of myself here except with his frame of mind he could come back tomorrow with another about face!
