Dori and Suzie went to the concert with about 10 other people.
Did they not invite you?
Yeah, I felt really left out.
It's clear you also would have liked to go but maybe they thought it was something you weren't into so they didn't think to invite you. You should let them know that you would have liked to go so if it happens again, they know to invite you.
Yea, maybe I should talk to them.
It's a good idea. It could have been a miscommunication problem.