I'm sorry for what brings you here starangel, but you'll find a lot of support here.
It;s impossible for any if us to say whether it's alcoholism driving these changes or not, but I know my personality changed after a few years drinking - even when I wasn't drinking.
Unfortunately unless he sees a problem and wants to stop, it's likely this is going to continue, and maybe get worse.
I dunno but seems to me like you deserve better than this?
D