Well, maybe the circumstances keeping you apart aren't really unfortunate at all. He does sound like he has issues with alcohol, and if his behavior bothers you, then it is a problem, whether he thinks so or not.
Sadly, there really isn't anything you can do for him. He is an adult who is allowed to make his own choices, even if those choices are harmful. It also sounds like his family are enablers, at least his mom for sure. Hard as it is, consider letting this guy go. Find someone whose values are closer to yours and who enjoys the same things you do.