Why does she beat up on you? Probably because you're the closest target. And in her mind none of these problems are her fault, thay're everyone elses (read you here) fault. So she "needs more space"? She probably doesn't like having someone around who criticizes her behavior. It's easier to drink when no one is on your a** about it. As most posts have already said, there's not much you can do for her. Best thing you can do is salvage whatevers left of you and get out of the relationship. It's either that or she's going to drag you down.