Friend's girlfriend, My pants?

Who cares, it's your house, you can wear whatever you want. If she has a problem with it she will tell you and when she does, maybe just throw on a shirt. Every time I go to my boyfriends house his 4 roomates walk around without shirts or with boxers, towels, gym pants, I don't care, I just don't look if I don't want to see it! She can get over it and not be such a prude.