Having no friends

I’m at a social event and I have nobody. I came with my brother and my only friend, but they already have their own friend groups. I do know some people here but I don’t really want to talk to them, I want to meet new people. Even when I’m at school I have no one. I think about trying to talk to new people but I never take any action. I go to therapy but it’s still hard for me. A lot of the time I avoid social situations just to keep myself protected. I know I need do just do it, even if I’m uncomfortable. But for some reason I’m just don’t. I’m thinking about joining some clubs but I feel like I’m not going to do anything. I always keep waiting that someone is going to talk to me first, but it never happens. I know I’ll make friends eventually but I’m tired of waiting.