Someone Help Me! I Was Raped

I need help. I've just turned 13. I found this website when i searched for rape victim support. I was raped by my boyfriend's bestfriend Josh (that's not his real name). Josh was staying at my boyfriend's apartment for little while until he found his own place. He seemed nice at first but than he started asking me weird questions or saying stuff that made me uncomfortable. He did it the other day. He was very rough and everything aches. He slapped, kicked and punched me. He pulled my hair so hard that little pieces are coming out. He told me i deserved it and i needed to be punished. He put it in my mouth and said if i bit him he was gonna kill me. Then he continued to rape me anally. It hurts to walk and sit down and i have bruises everywhere and i'm bleeding. My boyfriend noticed the bruises but i just told him that someone from school punched me in the face. I want to tell my him or maybe even my mom and im scared to tell my boyfriend about it because he might be mad at me or not believe me. I'm also scared to call the police because my boyfriend is alot older than i am and i don't want him to go to jail. Please someone help Tweet