Invitations

I wonder sometimes what it is about me that leaves me so often off the invite list to impromptu gatherings of my friends...

I have encountered this so often in my past and never really figured out an answer... I seem to have many friends and acquaintances, although I only truly get along with a small group of people, but I often seem to get left out.

I feel like the kid chosen last for the sports team (which I often was - at least that was because I sucked at sport!).