To clarify, so that the original poster doesn't let himself believe that I'm on a femme-rant, I attacked my soon-to-be-ex in a violent rage after finding out that he had been engaging in horrific extra-marital sexua| activities and interests that were so repulsive that they caused me to be nauseous. The attack came after six weeks of "talking" with him and directly asking him if he'd been with other people - which he denied. I am not proud of my actions, nor will I excuse them. I got help, immediately, and he went on to press charges, only to dismiss them. Before this incident, there had never been a moment of violence during our entire marriage.
Now....to get to the original poster, and it's harsh. Young man, you and your former girlfriend are in dire need of some intervention. You claim that you beat her from 2am until 6am while she screamed. No amount of alcohol can excuse 2 hours of torturous beatings. Get some frigging help for yourself before you kill someone and then whine about why you're in prison for the rest of your life.
NEITHER of you have any business drinking. Period. And, you set HER up by buying more alcohol when you stated that she was clearly already drunk. No business drinking, and no business dating another human being until you both sort yourselves out, individually. She is not the reason that you behave the way that you choose, just as you are not the reason that she behaves the way that she chooses. You each have some serious issues that will make for miserable, empty, and violent lives unless you each do something to stop the cycle. And, since you can only control yourself, I would strongly suggest that you take control of yourself and get the strong help that could save you from a lifetime of misery and/or incarceration.
Sexual orientation has nothing to do with domestic violence - it happens across the board, regardless of race, creed, cutlure, etc.
What I chose to do after my violent outburst was to contact the local domestic violence/abuse hotline, tell them EVERYTHING and ask for some guidance. Additionally, the marriage ended at this point - something that was inevitable given the circumstances even before my reaction.
You would both benefit from helping yourselves, individually. I would also imagine that remaining together, as a committed couple, would be a questionable idea at this time for you both. Sorting out my personal issues is an imperative before I even consider entering into another partnership or intimate relationship. From the words that you're using in your post, you are both engaged in a very unhealthy, unstable relationship, and it's not going to "get better," especially when there is a possible addiction issue present (alcohol, codependency, or otherwise).
I ended my 12+-year contract of marriage because truth, honesty, trust, and everything that a healthy relationship should be only existed in appearance. Was it painful for me? Hell YEAH, it was! Would the relationship have had a hope of normalcy if I had tried to make it work? NOPE...it was broken even before the nuptials. Sometimes, we are faced with ugly, painful, and heartrending decisions in order to heal our own souls.
I wish you positive energies and brightest blessings.