What’s he doing so far in terms of recovery and change? Is he engaged in a drugs service? Does he attend CA or any other kind of support services?
It’s brave of you to give him a chance, however in the end you end up giving more and more and more of yourself until you lose yourself.
If he wants to change then it has to be for himself and not for anyone or anything else, because although external things are a motivator it’s not the best. Internal motivation is when change occurs. How would you know he isn’t using? I suspect patterns and behaviours.
The lies, abuse, cheating, Betrayals, financial loss and so on and so fourth. That’s the reality and do not be fooled otherwise! That drug is dark and changes them into monsters.
I hope things work out well for you I do and take it from someone who’s been thru hell (with kids) this is not a rollercoaster that will be easy at all – in fact it destroys people.
So if that’s what you need and want then best of luck.