There's a lot that may be going on for her. Don't take it personally. Sometimes when people are back in town, they are here to do one thing - that may be just to visit their family, closer friends, etc.
I have a best friend who lives in Los Angeles and he doesn't tell me when he's in town, I find out eventually later. I don't mind. At first, I did because I would be like how come you didn't see me? He came down 6 times in May and not once did he tell me or saw me. I didn't take it personally. You just have to understand that when they are in town, they may be here to visit someone close or to do something - business-wise.