What do I do about my strict mom?

ok so i am almost 17 and soon to be a junior, i get good grades and am responsible, and yet .my mom wont let me hang out w friends, she has to meet thier parents but wont make the effort .she wont let me wear clothes that fit my body, only baggy ones if i wear my skort that everyone compliments me on, it goes down to my knees she calls me a slut and says why dont you have sex with every guy at your school? .i am not allowed contact with certain loved ones, because of her i see them once a year, and they are in the same town! . she says bs you dont have any friends if i try to tell her about my friends or my day, she says i am making it up . she verbally abuses me and curses at me for no reason . before my cell phone was lost, sold by my little sister along with my mp3, she checked every text . i cant be home if im sick the nurse had to force me to go . my mom says i am “seeking pitty” from the nurse if i have a period cramp, or vomit ect. .i cant call ppl i “bother”‘ them. . she tries to make me believe i am worthless and have no one . i cant go on a walk over 30 min once i did and she took my computer for 3 days though i needed it for my cba . she doesnt check or care about grades . the only sleep overs i have been to is 1 6th grade field trip w grandma 2 8th grade girls retreat w teacher she knows 3 ROTC lock in, she only let me go bc she knew someone from work there. .i need a password on my computer all i want is some freedom and to go to hang w my friends, it would be in public places too and a little more privacy i have tried talking, i cant go else where my dad cant take me, he cant be around all the time, i see him like 3 hours a week i cant run away i tried in 7th grade, got beaten. i tried to kill my self a few times and almost did, i am over it now, but it scares me. i cant disobey, that is imature i cant go else where and she wont let me get a job or go to driving classes they are offered at school. help! there is more so fun mail me for more details. ps i have tried talking to her