My sister & I are very close. For the last few years, we've gone on holiday together. Last year we went to an event (I don't want to say what because it might out me!). The event is something sister's BF claims he'd enjoy.
He's decided that him and sister are going to it this year, without asking me or considering me at all. Everything is booked now and can't be changed. I could book my own tickets etc. but it wouldn't be the same with him there- they tend to be very involved in each other!
I was really looking forward to going away with my sister because I don't get to see her as much as I'd like. I'm feeling pretty sad because of everything. AIBU to feel a bit pushed out?