i cant tell if theres alcoholism either to be honest. seems like a lot of focus on him tho and it takes 2 to tango. He didnt get this way overnight. I'd imagine if his behavior went to crap while living with you and it was drinking related you would have noticed the drinking issue prior to him moving out. Thats what makes me think theres more to this then if he drinks or not. He might be drinking more currently becuase its a crap situation etc.. it might lead to alcholism it might not I dunno. I know lots of folks who drink to cope but are not alcohlics (IE rough spot in life they drink then once it passes they dont drink anymore).
It soundes like he's shut his emotions off tho as a way to protect himself from you or the situation. Men can be like that we will shut it all off so we can charge forward with what needs to be done in order to get thigns done or protect ourselves etc..