Drugs
Whenever I trip with other people, it seems as if I'm always tugged along on someone else's ride. I'm influenced, overwhelmed, and overstimulated by the thoughts and emotions of those around me. It doesn't help that I'm already nervous on the come up, and this is why I prefer tripping alone.
However, I think I may have cracked the barrier I have with social tripping. And that lies in my current routine of taking at least a gram of CBD every day.