I am so sorry this happened (or is happening) to you. I believe you are in Southern California, while I am in Northern (Bay Area).
My only suggestion to you is to get the heck out and go to the police, or just call 911. Please don't wait for it to happen again. Something needs to be done NOW so he can't hurt you anymore.
The police may be able to find somewhere for you to stay until you can get back home, or they will remove him from your room. Once you are home Emeraldgreen's resources and Catty1's friend can help you from there.
Please do something, or this will not stop. We are all here for you.