On the rocks with 3yr GF?

We have been together for over 3 years. The past 2 years or so I have had a lot of negative feelings for her, but for some reason I knew deep down I still cared. The feelings came about because she is a very volatile drinker. She has hit me several times, got so drunk she pissed her pants and right on the floor several times, and punched holes in the wall. And everything was always on a six month cycle. After an incident, I would tell her to get the hell out then she would grovel for a week or so. Ending up with me finally taking her back. . But, that six month mark would come around and the same crap would happen again. She would not drink that 6mo or so, and everything would be fine. So I basically turned everything off, knowing That after another six months something would happen. Well something did happen. Now she wants to move out , but not break up? In my eyes that is a breakup. She tells me that I havn't been close to her, and felt alone. So, I explained to her why I was being the way I was being. Remember the six month cycle. She , as far as I know doesnt drink anymore. It's like she has to replace one drastic act with another. Everyday now It's I love you, , talking about her moving out, i love you, etc... Now I am under the microscope If i want to drink some beers at home or with buddies. Doesn't matter if it's 1 or whatever. Im crucified. "If you care about someone and you know they have a problem, why do you still do it." is what she says. But I do not drink around ,or keep it around her. But, the way I feel is you are going to have to deal with it. After all, I never hit you or did any of the things you have while having drinks. I cant say im a perfect angel, but never anything that extreme. So, should I go along with her plan of being together apart or what? I believe she loves me, and I still love her, but I dont think this is a good thing to continue on so many levels. The questions to me are, Does she want to go out and party like she did before. If that is so I know I cant trust her to do anything right. Any guy could take advantage of her. Or, is she seeing or wants to see other people contrary to what she tells me. My feelings are that if We are going to move away from each other after so long, it's not like you can go back to going to a coffee shop for a formal date. That ship has sailed after 3 years of living with her. What do you guys think?