You know way to much, that this isn't going to work out for you two. Let him walk out that door on Monday and when he is out, come back, let all your pain and suffering out and we will be here to give you insight on how your life can become better again.
You're never going to make him better and it's not your fault. You don't deserve to be yelled at or made to feel responsible. Good Luck. Keep reading. Take care of YOU!