<human>: Can you give me the gist of the text in a nutshell?

I just moved to a new school and I found a group that I really wanted to be a part of. Now, the group in question organizes these sessions for tabletop games and the sessions are a very 'group only' sort of affair. A few months ago, I actually got invited to one and I was ecstatic. Unfortunately, I'm still a bit of an 'outsider'. On Wednesday, we have another session planned but the game that people want to play can only have six people and there are seven people invited including me. Several people have already commented how I'm not part of the 'core' group and that I shouldn't be invited at all. Should I just tell them I can't come to avoid the pain that is quite probably about to hit me? Should I just leave it and hope for the best?
<bot>: newbiee in a group, invited to a game, too many people invited for said game, may be ditched