Littlebird, I am so sorry for your pain but grateful that this whole episode didn't have an even more tragic ending.
Keep looking after you and don't look back, there is nothing you can do to help him but there are a million things you can do to help yourself.
Start with finding a meeting on your day off and just go. Alanon, Naranon or CoDA are very similar and all great programs. Personally, I'd stay away from NA meetings unless you want to find yourself getting friendly with yet someone else who struggles with addiction. Codies are magnets for trouble, believe me, so stick to your own path and you'll be okay.
Hugs