can you be lonely in a group

I strongly believe that you can be lonely i've had it happen to me before i was at an upper classmen bon fire and i really didn't know anyone at the bon fire except for a cupple kids. I ended up feeling really lonely and kind of scared because i hardly knew any of the kids and i had no clue what they were talking about what so ever. I've also witnessed people feeling lonely in a group like my friend sean we had a bon fire for juniors and sean being a sophmore was kinda nervous and so he went inside and hungout with a younger sibling because im pretty sure he felt lonely.