Agree with you Ronandannette. Ex son in law was a functioning alcoholic. Started with occasional binge drinking in college but his drinking really ramped up after graduation. DD recognized the problem as the wedding approached but believed him that he could control it. Nope. Less than 2 years after their wedding, he was passed out drunk 4 -5 nights a week. Still got up for work, but he & DD had no social life or interests in common. (He would drink at home alone.) He was also a "sloppy" drunk - loud, vomiting, knocking things over, etc. He saw no need to seek help until DD said she wanted out. Then he went to 1 AA meeting 3 months later, when she saw a lawyer. He still thought he was fine & could control it.
The drama continued during their divorce with him calling, texting, emailing whenever he was really drunk & apologizing after. I am happy DD was smart enough & strong enough to get out before there were kids & more years of her life wasted. It is almost 4 years since she left him & she is happy & in a healthy relationship. He last contacted her about a year ago--- he was drunk. Just sad.