Thank you for the advice and support, everyone. None of the friends that go to school with me know because I am very silent about what happened. It wasn't playground stuff. I sincerely thought I was going to die, and she even said she was going to kill me back when it was happening. She's a complete sadist, and I agree does need help before she moves onto someone else. If anything happens again, even if it's just a threat, I'll be sure to take said actions.. Thank you.