I'm just a bit annoyed and I'm not sure if I'm over reacting but I don't think I am. A friend accepted an invite to my 4 y.o birthday party about 3 weeks ago. She's just sent me a message saying shes really sorry but another friend who her son is closer to is having a birthday on the same date and he really wants to go to that one so he can no longer come to ours. Our sons used to be at the same nursery, he came to my last sons birthday etc so its not as if they are complete strangers. I get that maybe this other friend is closer (apparently its his best friend now) but in my mind if you accept an invitation you should honour it! I'm now worried other people are going to flake out. I just find it so rude!! She sent me this long winded grovelling text about how hard it was to cancel which wound me up even more! It was as though I should feel sorry for her that she finds herself in this situation. It's surely basic decorum and manners to honour the first invite or am I being unreasonable to expect this of people??!