What can i do about my mom ??? ( please help )?

ok well basically my mom is an abusive person she and my dad have been having fights since i was born but i only witnessed the first one when i was 8 and she threatend to kill him with a knife i came downstairs and there was gl nall on the floor and it was well past 1 in the morning i had school the next day which i did not care about because i always could not stand school because these 3 girls who pretended to be my friends spread dirty rumors that i was pregnant and i was a slut when i was 8 and they ran away from me at play time and i had to eat lunch on my own (in those days i didnt like to be alone )and everytime i told the teacher they would turn it around on me and no matter how many times i cried the teacher would not care because they lied to her and everytime i was smiling happy and having fun they scowled at me and tried to make my friends hate me.Anyway my mam always hit me the first time was when i was 4 she got a wooden spoon and hit me in the head which sent me to the emergency room and she told me to lie and say i hit my head she hit me because i was playing a game with my sister and we were making too much noise and then through out my life she would regularily smack me when i was 2 or 3 my dad would hit me and my lil sister with his belts they hurt and i can't remeber why i just remeber it happening when i was 10 my dad went away for the first time my mam hit me with an iron something on my knees and kept saying i was her worst child and she punch me in the face and the more i cry the more she would hit me which makes me hate my mam very much and that day i thought if you prayed to die you would (silly me that sounds really stupid of me ) so i kept trying to pray to die becasue i was in so much pain . and the 2nd time my daddy left me was when the worst one happend i sat outdise in the rain crying and she picked me up and threw me in the house and then she had a brick from the neighbours and tried to hit me with it but she missed and then she caught me and pinned me down and kept hitting me then she got a broom and wacked me with it and then when i went upstairs she followed me and threw a drawer on top of me and .then later on in my life when i went oustide to play this boy i knew said he wanted me to kiss him so i talked to him for a while and i did he was real cute but he was 5 years older than me he looked about the same age as me though anyway afeter i came home my ma saw him trying to talk to me thru the window and she smacked me across theface and went out to (ALEX) thats his name , and started screaming at him things i din't hear and then i was banned from going outside and we don't go on holidays so i basically just go to school go home and sleep go to school go home and sleep , then i started getting depressed and tried to kill myself but i only went unconscoius and when my mam found out she went crazy