I'm very sorry for what happened regarding the sexual assault - i hope you told your parents. The best thing to prevent suicide is reach out for professional help and if you're feeling unsafe, to call your doctor or nearest ER. You need help so you can release this pain and anger. You can't let the scum that assaulted you win - triumph will be healing and making the best of the rest of your life. When the feelings are strong be patient and get help. You've internalized all the pain from this bad person and now its time to heal. Here's some links and I hope it gets better for you.

http://psychcentral.com/resources/Suicide_and_Crisis/

http://www.metanoia.org/