Okay, first he isolated you geographically. Now he's isolating you both emotionally with his accusations and socially by banning you from his Christmas party.
You don't have to leave if you don't want to, but now seems like a good time to start taking care of yourself as though you're going this alone...and alone is exactly what he's trying to make you feel.
In my mind and in my experience, it's our first responsibility to not allow other people to ruin our lives. It's the other side of not harming others, and equally necessary.
EndGameNYC put their finger on the beginnings of a pattern that can suggest abuse. You might go to the Friends and Families Forum index page and look for the "stickies" - the permanent threads of universal interest at the top of the page. Find the one called "What abuse is" - - it will give you some insight as to whether you are dealing with alcoholism or with abuse beneath the alcoholism as well.
ShootingStar1