Thanks for your replies. My child has already stopped saying where they are going, has started doing most homework in the library and they don’t goto bed when ordered. 
My child does not feel threatened - they just feel uncomfortable when in the room - don’t feel like they can have people over, sick of the constant ordering around (which they do give in on a lot just to avoid confrontation), and the negative comments on their personality and intelligence. The roommate is always there so my child has no where to goto relax. I just am not sure if the school will consider it a minor personality difference or actually allow him to switch rooms. Its not like the roommate is partying in the room constantly, no smoking, drugs, up til all hours of the night, stealing etc. (that is what I mean by it could be worse).