tbh I wouldnt bother sharing with your boyfriend, obviously if he's staying in the same halls then you can always stay in each others room whenever you want. but atleast if you have your own rooms to go back to you can atleast have a bit of personal space when you need it. Plus I would think it would be a lot better making friends wise to be by yourself, atleast then you are forced to talk to people. I have noticed that couples who share rooms at uni tend not to be very sociable and just stay together most of the time.
up to you though, I just think its always good to have your own space!
x