Boxers don't stand the cold for too long. My boyfriend and I moved in about 3 years ago. He did not want the dog at all! He was almost adamant about me giving him up, saying that it's a pain in the a** to find a place, why can't you just give him to your parents. I told him I wanted to keep him and that I felt safer having him around. Anyway, after we moved in together Oscar was only 1 at the time and was a total terror, he would get into the trash, eat both of our shoes, chewed on the walls of our rented house, and destroyed the backyard. I though BF was either gonna kill me or the dog. As time went on they got closer and closer and now I have to compete for attention from both of them because they love each other so much. I understand your girlfriend isn't a dog lover but neither was Mike, when I lost my lab to kidney failure and cried he told me "it's just a dog". I wish you the best of luck with your move and convincing your girlfriend to let the dog hang around. I hope she comes around. Best of luck!