we invited family and some friends out for dinner for my bday. one of the friends wanted to invite THEIR friends, saying it would be good for me to meet them and that they usually do something at the weekend together anyway with them. AIBU to say no, and that i just want to keep it to people i know? its not that i don't want to be nice, its just that for my birthday i don't want it to be a time of meeting new people etc i just want to cherish and enjoy the friendships i have and my family. should i just keep them happy by inviting whoever wants to come?