How to teach my brother that "incest is shit "

Hello ,
I am seema from Gujrat [india] . I can not understand what happening with me . From last 6 month my real younger brother trying to sex with me . i cried at her many time and told that i will complain to parents but never did . So now he become bold and try force on me . I can not expose him at my parents . But he is doing wrong. what should i do now ? Please help me