Maybe pick a date -- about a year out or something to check back in. See how he is doing then.
Just stopping is one thing, but staying stopped and all the self-fix-it he has ahead is enormous. You really do not need to be dragged through that.
Meanwhile, let's get you fixed back up?
You have probably read it here (over, and over, and over?). Alanon.
Do you know What, When and Where for your local Alanon?