If you decide that you just can't stick with your roommate for the rest of the year, figure out what to do next. If you live on campus, talk to your RA again. If you live off campus, figure out what your options are in terms of the lease and relocating. You aren't the first person ever to have a problems with a roommate; there are undoubtedly resources already available on campus to help you transition out. Regardless, do your best to remain civil and respectful, and know that your next living situation probably has nowhere to go but up!