yeah, I don't consider myself shy, either, and as a child I used to make friends with anyone and everyone.

there's one website where it says "HSPs are not fearful of fireworks, crowds, parties, or travel, just reluctant to suffer the discomfort of overstimulation". This is so true. I hate flying not because I hate planes, I just hate the anxiety I get from being stuck in this enclosed space with a bunch of people.