I highly recommend you consider your options for living apart for a semester. In my class, there were numerous couples who had to live separately for 6 months up to all 3 years of schooling. Many found a cheap roommate and reconnected when they could. I'm not sure your reason would sway the school to allow for deferral....general, they are medical situations or big family situations (i.e. death in the family). You will likely have to live apart while you complete clinical rotations anyway....so if I were your school, I would be worried about your ability to live apart to complete clinicals in the future.