I’m generally quite introverted and, while I enjoy meeting friends, it can sometimes take me a little time to work up to seeing several in one go. I somehow find it both fun and draining at the same time. So for bigger groups I prefer a bit of warning.
Lately I’ve had a couple of invitations to come over to someone’s for dinner where it then turned out that they’d invited other people too, when I had thought it would be just me and my DH plus hosts. On one occasion it was people we knew, on another it was the hosts’ friends but not ours. Nothing bad happened, but AIBU to find that last minute change a bit stressful (in my head, obviously I don’t let on to the hosts)?