Sorry I haven't kept up with the thread.
Re my ex best friend - it's always been obvious that we are very different people. I'm divorced and very independent, travel on my own all over the world etc, whereas she and her husband are very co-dependent, so she has to check everything with him and he with her and they decide everything together. So for this occasion, I spoke to her husband first to get the all-clear and he said yes it was a great idea and she'd love it.
As it happened, I decided to book a different city to the one I'd told him and apparently he was upset because he wanted to take her there. Another issue was the fact she had a friend living there who wanted to show her around and organise things for us. Being an independent soul, I wanted to do this and have surprises for her. She, on the other hand, wanted it all set up beforehand, so the friend got involved (who I'd never met).
So, as the date got nearer, things were getting a little frosty and I was trying to keep it together re the friend etc and looking forward to the trip and deciding the time alone with her would be a good opportunity to re-connect.
Then she rang to tell me she'd go to the airport with her husband because she wasn't sure I'd get there on time! (She'd have to drive past my town to get to the airport.) At this point, I started thinking she'd be best off going with her husband. She told me she didn't want to go now and I said she could go with her husband and I'd back out. We left it there and I didn't hear from her again for a year or two when she tried to re-connect, but I couldn't see past it.
The other two friends were sisters who always met up together, usually at BF's house for coffee. I was surprised and hurt that they never got in touch after that and tbh as time went on I realised that her friendship with them was more important to all of them than mine. The time that she did contact me, she invited me for coffee with the others, as if nothing had happened - years later! It was all over for me by then.