I would say, in a not profressional 's opinion, that he has a personality disorder. He is not right and the alcohol is making it worse. Alcoholics are notorious for being liars. They would not know the truth if it hit them in the face. So if he confessed to 11 days, you can bet its more like 3. Be on guard. And please keep yourself safe. Is there anyway you can move out?
I would not belive that he is stable. H