LadyinBC is spot on. His parents are currently “keeping him sober and in line”. This is a parent and child relationship; however you don’t want to be his parent, you want to be his partner. It’s not your responsibility to keep him sober nor is it his parent’s responsibility. As a mother I understand the urge to protect your child from the consequences of their behavior, but I’ve also learned that it's not always in their best interest to do so. As LadyinBC said they can’t do this forever.