I agree with all the above 100%.
Please keep going to the meetings. Even if you don't feel like they are working at first. Work the program and it will help you. Give it a chance.
As for whether he's using or not trust your gut. If he is it will become clear, they are able to hide it to an extent but those little signs will tell otherwise. Your going to know & when you've had enough of it you'll know that too.
I know how you feel, we all do.
Hang in there.
Teggie