My older sister is somewhat abusing me practically everyday now, well not everyday. Yet, there was time where she pushed me down the stairs and almost killed me with a knife. Of course, I told my parents and they did nothing, just gave her a lecture but that's not enough. She's still doing it and constantly blames everything on me. Today, she threatened to bring all of her friends to beat me up. She threatened she will kill me one day if I tell her secrets to our parents. I really want to stop but I'm afraid and I have enough of this crap!

Do you think I should call the cops? Or something else that will get her to stay away from me?

What should I do? I am already feeling a bit... suicidal lately.