L.A.
You go and rent a car and let her know where you are going and ask her to join you. If she is not up to it, then go by yourself..
And no, I have never experienced anything like this, because before I go or friends come to visit and visit, we usually discuss ideas of what we all want to do and try to schedule it out..
Do you think she is depressed? Not about you being there, but in general?
Do you think they are having financial problems so she is worried about spending money?
We never really know what is going on in others homes, even our very best friends.. You need to let her know you are there and care about her.. see if you can get an idea of what is going on..