Have you ever gone on a trip with 2 other friends and felt left out?

I think I often end up in that position by my own doing because I have nothing to contribute to conversations. It's not that surprising people don't really want to talk to me because maybe I don't even have much to talk about after all. I'm not people's people, I can't joke around and I'm a terrible entertainer. I think way too much about what to say and sometimes I can't even find words while talking. I'm just grateful someone actually invites me to some event or trip so if I want to experience something new and interesting I don't have to go to places all by myself.