I have had that feeling most of my life. I'm a people person that loves getting into conversations.... but I'm a one person at a time kind of gal. I don't function well in large groups. Even way back as a child, people often commented to my parents about how well I played by myself.
I have always had sensory overload issues... especially auditory. My hearing checks out perfect, it's just the processing in the brain that has gone haywire. I tend not to get into conversations if a group is involved because I just become the "wallflower" because I can't handle the many voices at once.
Until I was diagnosed with MS and learned all the possible things that it could affect, I just thought I was an odd ball.