I'd just watch his actions, and not rush into making a decision today.
He is who he is, sober or not, he will not become a different man. Drugs and alcohol can magnify ones personality traits, however, that's it.
Keep working on you, codependency is difficult to overcome, yet for me it was a reawakening, a rebirth, for that I am grateful, I can now open my tool box, use my recovery tools and stop myself from jumping into the fire feet first.