<p>Is there anyone above your RA that you could talk to? A head RA or a dean of housing, or someone else in the Res Life office?
Try to set up a meeting with your roommate and someone with more authority to mediate. Explain that you have some needs that aren’t being met-- you don’t have to say exactly what bothered you, just say that you have trouble sleeping when he has visitors or music.
If you haven’t already, write up a brief contract of room boundaries together and sign it. It it happens again, whip that sucker out and make him feel guilty.</p>