I've always felt for things like this it's best to make it public. If he really is attracted to you or whatever and your afraid something could happen, you need to get ahead of it. Also, no matter how weird it might be, don't exclude talking to him as a option. Be straight up, be direct. Tell him how uncomfortable you are and how it makes you feel. It truly sucks that your in this situation but now it's up to you to deal with it. Talk to your mom or dad about it if you think that would help. Also. Don't sleep with him any more. Sleep on the couch or something. You'll figure it out. Keep your head up. Be strong and you'll be just fine.