I want to marry 16-17 ld girl. plz consult legaly. what should i do?

my gf is 16-17 old. she is brutly beaten by her mom dad n brother daily. servent in her house tried to take advantage of her and her family member think she is a lier. we both have decided to run away n get married or we both should suicide. plz consult me legaly how i can hekp her. it is too much necessary to keep her way from her parents. no one is there to understand her or help her. Else we both will sucide