Hi, Marie. Welcome. I think you were wise to kick him out. Time will tell as to whether he will cut back or quit. Personally, the odds aren't good. I would say he is saying the things that will allow him to move back home.
I strongly urge you not to let him move back in. If he is serious, he will work a program of recovery, and it's best that he do that on his own. This also gives you an opportunity to work on the issues you are now recognizing. Peace.