I dont know what to do about my sister?

for the past 5 years me and her have been HATING each other like hell! its always getting out of hand im the type of person who will do everything in her power to make my parents happy but she ALWASY find the worst time to complain about me! shes 17 im 16 and so when my mom is happy and buys us stuff she goes like oh mom i just remembered she did so and so... ITS SOOO FREAKING STUPID! and today me and her had a fight she touched my stuff and i slapped her hand and told her stop she she took off her shoe and beat me with it and i protected my self with a weapon. so then she told my mom and my mom is VERY mad i thnk i have had enough of her i just cant believe how much of a pain she is in my life...if she would disapear i would relax i almost fainted today after the fight i fell on the ground and my brohter told me to wake up by spilling water on my face i was so scared thats why i fainted she scared me so badly i cant believe how bad my ife is because of her...what do i do !!? i tried to be nice to her she uses me and when i ask for a favour in return she says no and when she wants something from me i say yes thinking it will make her hel pme out more BUT when i ignore her she SCREAMS at me and tells me why are u ignoring me and ur rude s she screams and tells my mom how "rude" i am i just dont want to talk to her because i know it will end in a fight and she SERIOUSLY pisses me off sometimes i cant keep quiet i tell her shut up HELP