I've been going out with this one girl everything was going pretty good, she went out of town for a week with family. I picked her up from the airport everything was cool. Now I'm getting the "I'm really busy" treatment. What usually causes such an abrupt change, we usually see each other a few times a week but we haven't hung out for about 3 days and very little communication. She called me at around 11:00 last night, to say she was tired from work and going to bed. What should my actions be? Do I say anything about the sudden change?