krhea,
Your not giving up on your son remember that, your helping him to help himself. I am sure he is trying to make you feel like an idiot and guilty and I think it may be working?
Stay strong and keep with your word. Do not let him talk you out of it. I know it seems easy for me to say but you will be telling me the same if my AD does the same to me when she gets home.
Were all behind you and here for you. ((((hugs)))))