Ditto to all of the above.
You don't have to do anything, including putting your life on hold and fretting trying to figure out his next move. Maybe his knowing that he has a soft place to land keeps him partying and out there.
As one mama to another, let go dear and reclaim your life. The outcome for him will not be any better or worse, no matter what you do. But the outcome for your life and marriage will be happier when addiction does not move in.
How do you let go? Love him enough to say "no". Love yourself enough to say "NO".
Hugs