My boyfriends best friend tried to force me to sleep with him.?

Last night I sleep over my boyfriends around 11 everyone went to bed. My bf and his friend went to sleep in his room, and his mom makes me sleep in his sisters room. We are all 16. His sister was at a friends to I was alone. about a half hour after everyone went to bed I was still up watching tv when his friend connor came in and said my bf mason was asleep and that he was bored. So he laid next to me at first we were just watching tv but then he tried to but his hands down my pants I told him no and to leave the room but instead he forced himself on top of me and said he was gonna f**k me. so I pushed him off and kicked him in the balls and he left the room. I am afraid to tell mason my bf. I have known his friend connor forever and can't believe he did that. I think I am gonna talk to my bf's mom about it because now I don't feel comfortable around connor now.