Addictions run in the family

About four years ago my mom began to suffer from Alcoholism. Alcoholism and other addictions are extremely common among those in our family. My mom's mother, father, sister, aunts and uncles suffer from these. My brother and cousin also suffer from addictions as well. It's been very devasting to me because I am her favorite punching bag, literally and figuratively. From what I have read about addicts they tend to hurt those closest to them the most. My mom's "favorite" thing to do while drinking is to lash out at me and say all kinds of damaging things. After my boyfriend/fiance of nine years left me she looked at me and said "Well can you blame him? Look at yourself. You're worthless, a mooch. You're never going to amount to anything". Only a few short weeks ago she actually told me I was a burden and have been since I was born because I have gotten in the way of her relationship with men. The exact words were "Well when you have kids, they just come along, then they are just there, then they leave. But your spouse is always there and if you put your kids first your spouse won't be there when your kids leave". During one of her drunken fits she told me to get out of her house and to never come back but blocked my way to get my personal belongings. When I pushed my shoulder into hers to move her she slapped me so hard I feel into a cabinet. Which then proceeded with my physical reaction. After about an hour of back and forth between physical and verbal warfare the cops were called and I was arrested. Within the last four years I have come to realize a lot about the person my mom really is. She's no longer able to keep up the lies and tales she has spun about her life. I know a lot of what she has said about her life is true but there are other things that have been proven untrue. Mainly her relationship with my grandmother. Part of what is so hard to deal with is that she was put through all this from her parents and vowed never to put hers through it, yet her she is living up to her parent's legacies. I realize addictions and abuse are like cycles, it's all they have ever known so they do it as well. I don't know what to do for her. In the beginning, her thoughts on this were "I have a problem but it doesn't cause any problems so I do not need to stop. These gradually changed, and today she says "I do not have the insurance or money to go to rehab". What can be done, besides isolating myself from her?