Which part bothers you more, the fact his addiction is in full swing again or the fact that you feel embarrassed by his unacceptable behavior to mutual female friends on social media? Addiction is a progressive lifelong disease, when you met he was addicted to opiates, today the addiction is showing its ugly head with booze. And who knows what tomorrow will bring, that’s how it is with addiction.
It’s good you are going to al-anon and I think learning as much as you can about addiction and about addict behavior will help you make sound decisions for yourself and your future.