You are attracted to an addict for obvious reasons. You have the personality that is ripe for this with mentioning "I just wonder what I can do to help him with his recovery?" due to your paren'ts addiction. You can't help him. Instead ask what you can do for yourself so that you change fundamentally. Until you change you will be attracted to addicts and the cylce will repeat itself. Do the work now before divorce and raising children through this. Your addict friend is wise though to halt your involvement. Listen to him and take it seriously.