Yeah, sounds like a strange topic for an AvPD forum.
But I observed that there are some social constellations than make me feel less uncomfortable than others. And I'm curious whether others have the same.
I prefer structured and goal-directed interactions. When I meet people for study purposes it's easier because we have a task and I don't have to be afraid to bore people.
And I prefer to be with 2 or 3 people. Dyadic interaction scares me, because I feel responsible to keep the interaction going and in this setting people might expect me to open up. And when I'm alone with a guy who could be interested in me, I'm afraid he might seek physical contact.
With two or three people I'm usually fine and even talk a lot. Bigger groups are difficult. It happens in groups that someone starts talking and than realizes halfway that nobody is listening. I would feel rejected if that happened to me so I don't say anything when in a group except when asked.
So I prefer being with 2 or 3 people for some purpose (studying, waiting for the bus etc.).