SEXUAL ABUSE help me

when i was 13 my sisters bf would touch me sexually and threatened me if i spoke hed hurt my family. this happened till i was 21 when i moved to anither state with my bf.

I finally confessed yesterday and she says im lying and HE denied everything :(

and now she said to never speak to her again & i will never see her again :(

what do i do? im so depressed...

please help me :( please !!!!

i cnt deal with this pain.!