Would you be upset?

My bridal shower was this past weekend and a friend of mine who i have known FOREVER was invited of course. She and I were talking (she hadn't RSVP'd yet) and I was like so am i going see you on sat? And she told me that she was going to be gone all week on business and then had to come home and pack again and leave again on monday and that she wasnt going to be able to come. She also listed all these things she was going to miss b/c she was traveling for work. (she lives in ohio i live in indy) But then last night i was on facebook and saw that she was in Bloomington at a graduation party for another friend. Do I have the right to be a little upset? Not about her not coming to my shower but about her lieing to me about not being able to come? What should i do?