get out. fast. there are many wimmyn's shelters around everywhere, try some close girl buddies, do anything. my mom has been putting up with my father for 15 years, and shes had plenty of oppurtunities to get out, and she hasnt. i dont want you to end up like her, trapped in a very very ugly relationship, and keeping the three of us (my sisters and i) trapped in it. are you in college? do you go to any kind of school? because maybe then you could move into a dorm or a small loft/apartment on or near campus and that would be better. this is a good oppurtunity to help yourself, and perhaps get him some help as well, so that if there is another womyn in his life, that this wont happen to her. DO NOT RISK ANYTHING. Get out. Do you have a bank account? draw out some money to rent a place for a little while, just please for your safety get out. If he truly wants you to be in his life, he will sober up, get rid of his nasty new buddies, and agree to therapy/conseling of some kind. If he doesnt, then he is not worth it, and defintly not worth a trip to the hospital or feeling like you are his punching bag.
please, leave the situation immediatly, go somewhere safe, and DO not contact him while you are alone, even if its by phone. always have a person with you, and always have a quick and easy way to contact authorities if need be. if you do call him, have people there for support to help you out. If you meet him in person ( which i do not think you should ever do under any circumstances) do it in a public place with lots of people during day light. you do not know what he will do if he shows up under the influence of drugs or alcohol. And if he does show up under the influence of a substance and does get violent, there will be lots of people to witness and hear your calls for help.
i hope that helps, and please, your safety and well being should always be at the top of your list.