Yes, he is trying to manipulate you. If he truly wants to stop drinking and work on recovery, he can do it regardless of where he lives. If he says he can't do it without living with you, then he isn't serious about it. That's the bottom line.
Good for you for sticking to your guns. Don't give in to his demands. If he gets mad, he can get glad in the same pants. It's all an attempt at manipulation anyway.