Quiet vs. Shy

I've probably spent too much time trying to think of a good way to express the difference between introversion and shyness, and the best thing I can come up with is that introversion is a choice, while shyness is more of a compulsion, a fear of social interaction. It's not much of a definition, I know.

I'd much rather be quiet than shy. It's hard to really be happy if you want to interact with other people, but are held back by fears of rejection...which I am. It's pretty miserable...I have a hard time even going to a crowded restaurant or cafeteria, let alone starting conversations with people I hardly know. If you just aren't as interested in being social as most people, I don't really see that as being an issue.

Jam it back in, in the dark.