Help, I'm being beaten and made fun of by my own family?

please help. I cant bare to live this life anymore. I've been beaten, abused, hit, and made fun of all my life. I'm only 12, and I cant do this anymore. My life is strict, I cant get married to a man my parents don't like, I cant move out till I am am married. I cant shop unsupervised. I cant go alone outside until I am in grade 9, I'm only in grade 6. I had to write this today because I was seeing if we had enough money to buy WoW. I put in 2 dollers and it made 31 $, but I found out if you half put the money in, it still counts 25 cents extra. I was showing this to my dad, and then my mom yelled at me. Then I turned to her and saidL " wasn't talking to you." then my dad said: "Here comes the beating." she hit me as hard as she could on my arm, in front of my grandma, and I began to cry. She said that I would break everything in the house and then smacked my head and told me to go downstairs. In shame, and crying I ran dowstairs. Now I am writing this. And I dont want to go back upstairs because of what they did to me. I hate my parents, and I dont know what to do. I cant run away, I have no place to live or. Please, help me. I cant bear this pain anymore. People laugh and make fun of me, everytime my parents tell them about me! I always think to myself when I am crying in the washroom: "Nobody cares, eeryone laughs and looks at me. Nobodys gonna do a thing." Nobody does a thing anyways!