The author primarily struck me as shy and/or socially anxious. I am an introvert in that I have VERY little interest in people and feel mentally drained after even the most fun and relaxing parties, but feel energized after isolation.

And yet I have no problem initiating conversation or small talk or meeting new people or anything like that. In fact one of my pet peeves is when people confuse introversion for social anxiety, they are not the same thing.