Im 15 n i wanna leave my house because im tired of my big sister who im scared for my life?

Im 15 years old n i wanna leave my house and live by myself i dont want help from no one unless its helping me leave my house cuz im scared for my life im tired of living here with my 24 year old sisters wev been arguin for months now i cant live here with her my relatives dont want me i got no dad n my mom has her side n loves her more than me i feel lost my skool cant help me im lost i rather die then keep living here plz someone help me i cant go on her leavin is not an option n my mom dont listen im bi cuz when i was 7 she usto make me do sexual stuff with her n my mom dont belive me im not going to no mental hospital , cps , or an all girl camp ok iv seen what tat does to kids they dont help at all i want a happy life im tired of suffering either way im leaving my house dead or alive!