You’re in a terrible spot worrying for a loved one. There is nothing you can do for him except encourage him that things can be different if he so chooses. He needs to make a decision and then put in the work. There is no magical solution and no specialised program that is a guarantee. Most ppl who go to AA experience a jolt of hope and support and that’s a good starting point.
Here’s a list of further resources for addicts. Resources for our recovery
I encourage you to take your own position and your own struggle seriously and look out for your own emotional balance and wellbeing. That’s your side of this.
Best wishes!