Advice

Hey guys. I really need some advice. My boyfriend and I have been together for 7 years now. Everything was going pretty great. We both have jobs and we get a long real well.. or at least we were until we had an argument a few months ago and he hit me. I started crying he apologized and I thought it was over until he hit me again a week later. Things have been going worse since then and they escalated 3 days ago when he punched me so hard that I fell and my eye was bruised. I have always been submissive in our relationship but things are getting out of hand. I am scared of him. He is punishing me to go to bed without dinner or to sleep on the ground when I disobbey him for something. He has become very brutal in bed as well. He chokes me. I am just so scared of him I am affraid he will kill me if I leave him and when I am at home and he is home too he uses me like his slave. The reason that he punched me in the face last time was that I refused to lick his feet when he came home from work. I really don't know what to do. I am so frightened.