Is my relationship going south or is it all in my head?

My gf and I have been dating for about eight months, and after school ended I went back to my state and she stayed at hers. She is working as an orientation leader and has been super busy. She hasn't been talking to me as much even on her free time. She says she is fine and still wants to date and that she is fine with the long distance thing, but I'm just seriously worried about how she isn't talking to me as much. Even when she has free time she doesn't seem to want to talk.