How to tell my mother that i want to live with my aunt?

ok 15 of course and i cant live with my mother im officially her prisoner i hate it cuz i want to see my dads family more especiallyy bercus so many things are gon on over there and if i go its for 4-5 hours an sat and thats it. its all becuz im emo and thats the ecuse she hangs on to i cant move in with my dad becus he is in a bad sit so he says i should move in eit his sis my awsome aunt i agrree i only stayed with my mother for so long for pitty even since i was 4 i knew wat pitty was i cant take it anyymore i lost so many people i love bcause of her how do i tell her im not living with her anymore please help!!!