Is AUTHOR wrong in the post ? POST : This is a long one.

All through middle and high school there was a group of 6 of us, we were really close and spent a lot of time together. Eventually we parted ways when we went to college. After freshman year I was planning a trip to where one of them (let's call her Anna) was studying and I figured that I could meet up with her so I started talking to her about dates and places I could stay and stuff. 

Now, some background. These friends (Anna included) are pretty flaky. They had a bad habit of always cancelling plans at the last minute, which is a pet peeve of mine. We had previously planned a cross country road trip. I specifically told them (having been cancelled on last minute several times before) not to get started with this trip unless they seriously intended on coming. Of course, they cancelled and I got pretty annoyed (I did not confront them or do anything other than leave the chat group I was in with them). Now after this things went back to normal (or so I thought) but recently I found out from another friend that they thought I was being a bitch (which they did not communicate to me in any way). 

So back to Anna. I had asked her if I we could maybe stay in a room together while I was there and to give me her dates. I kept asking her for a few days but eventually she stopped replying. I got pissed (having been in this situation before) and just planned my trip without her involved.

A few months later she let us know that her uncle had died. I expressed my condolences. However, a few days later I found out via snapchat story that she had actually come into town (across the country from where she was studying), met up with 3/6 girls in our group and gone back to college without even telling me or my other friend Barbara (also part of the group) that she was even in town. I was extremely shocked and upset by this. I knew maybe I shouldn't have ghosted her about the trip but to come all the way into town and not even seen me (or my other friend)? Furthermore, a few weeks later she came back again to attend some event, once again didn't contact me or my other friend and left without telling us that she was even in town. Since then I haven't spoken to her or the other girls in the group she met with who apparently didn't think it was worthwhile to let us know that she had come back. She had given no indication that she was upset or angry with me in any way. 

I should add that we had already been growing apart for a while (the 4 of them vs me and my friend Barbara). I don't know why she would suddenly stop talking to me. Is it my fault for being annoyed that they flaked on the road trip I was planning? If they had explained to me that they were hurt by what I had done at the time I would have apologised but they made no mention of it to me (one of them told Barbara, who recently told me). So AITA? Should I apologize and try to patch up?

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