Yes, I would ask about their thinking on the subject. I imagine they want you to move on some from where you use to live; it's one thing to visit old friends on weekends but going back to live there when you are in a new place you'll be for a couple years (and presumably going to school in, etc.), they may just wish you'd try to engage the new place. The exchange program would be something "new" (and with your school?) but sounds like you are hoping to stay where you "were" and that could get you stuck emotionally. Everything changes and that will change too and trying to hold on to what was makes it much harder to respond to what is.