Kid has a hard time doing things without friends

My 10yo pushes back really hard against any camp, activity, or outing where he doesn't have at least one friend at. In fact, a single day without seeing at least one friend changes his whole mood. Anyone else have kids like this? Do you make them do things without friends, or let them bring a friend to everything or only sign them up for things with their friends? On one hand, I try to prioritize things with his friends because I realize he's a big extrovert and this is important for his mental health. On the other hand, sometimes you do have to do new things without a friend - like what happens when you go to college or start a new job? I figured he needs to also learn to make new friends or feel comfortable in situations without a friend. I'd love to know what reddit thinks