Need some sisterly advice

[HBADPi]

So first I need to give you guys some background on the situation. I have a chapter sister we'll call her Sally who I am very close with and was in her wedding last year. She was also on my recent trip to Europe along with her husband Bob and some mutual guy friends Jason, John, and Mike. I love her to pieces and she probably knows me better than anyone else.

Anyways after the bf broke up with me, plans I had for NYE changed and I decided instead of being out in CA miserable I'd fly out to Pittsburgh to visit college friends. Now Mike has this annual reunion up in Butler (for those of you who arent that familar with Pittsburgh its about 40-45 min away if that) and it turns out that this year it fall on Dec 30th. I was invited to go but I hadnt originally planned on being in pittsburgh for that weekend but also wasnt sure I'd find a cheap ticket that would get me in town early enough to go.

So now that I have my ticket and I get in at 5 pm on the 30th and the party starts at 8 I can go. I emailed everyone to tell them and Mike said that I have to come. I called Sally to tell her that I am going and she gives me the run around...Butler is too far away and a bad drive (its off the major highway in Pittsburgh!), how she doesnt know if shes going, how its not that fun, its only a guy thing etc etc. Later on that day I'm talking to Jason and I tell him how Sally said she didnt know if her and Bob are going. He tells me he talked to Bob last week and he had already purchased their tickets to Pittsburgh from Boston and how John was picking them up from the airport and taking them straight to butler. Now I'm a little hurt and I dont know if I'm overreacting...what would make her say that if her husband already purchased their tickets. The only thing I can think of is if she didnt want me to go. These guys were friends of her and Bob before I befriended them but I went on vacation with them and we've hung out before so why is it an issue now??

Thoughts? Suggestions?