Even when I was a dub I felt this way. I mean, I would just stand there at gatherings and feel that I was in my own world -- that, somehow, everyone else was "in" and I was "out." I never felt this way at formal gatherings -- meetings, assemblies, etc -- only in most social settings.
I'm in college now and usually am the person in class that is the most vocal -- asks the most questions, takes the lead in group projects, stays behind to ask more questions. But, put me in a "non-formal" setting and I just lose it. Sure, I'm comfortable with my close friends (which stand at about two people right now ), but everyone else -- they're in a different universe.
I'm probably not being very specific and I hate to be so whiney. Been a bad day. Hell, been a bad life! hehe...j/k (sort of).
Bradley