Well, there isn't much more I can say that hasn't already been said other than adding my name to the pot of people who did not heed the red flags - even when they were hitting me square in the face. He was amazing the first year we dated (because it wasn't real)...we had so much in common it was like a mirror of myself (because it was)...what is happening with this guy? He must be stressed (no he's an alcoholic). I must be really annoying (no, he just needs me to be so he can drink). Maybe he's having seasonal affective disorder or some sort of mild bipolar issues (no, he's just a mean drunk with a big ego). What happened to that guy I dated? Oh yeah, that wasn't real.
What happened to me? Oh yeah - I got involved with an alcoholic.
Be very careful and believe nothing until the actions back it up in a consistent manner. And then still have some doubt.