My mum is pushing me further and further a way.?

Im 16 (17 soon) my mum is so harsh on me, she hardly ever allows me out and when i do ask to go out she shouts at me telling me im so selfish and that i go out far to much. Its ruining my social life and my friends get so annoyed with me because of it. I tried to stand up for myself and told her i was going out no matter what she said she retaliated pretty badly wont go in to detail about it. I baby sit my sister so much for her and do lots of chores round the house. I feel like i get it so much harder than my friends. What should i do?