I often see a friend, A, on the school run and walk with her and chat.
If another friend, B, comes along, she always greets A, and ignores the fact that I'm there and her and A instantly start having a conversation and ignore me. If I say hello to B she ignores me.
This morning I'd had enough and just walked off.
AIBU to think it's rude and to just walk off each time they do this from now on? To add, I initially introduced A and B to each other and have known B much longer than I've known A.