Old comment but this is so real. Hell, the people who know me call me extroverted. But boy do I have social anxiety. There is definitely a distinction. I am extroverted because I loving being around people I know and I am generally comfortable getting to know people if they are not total strangers i.e friends of friends.
But for some reason, a lot of strangers at once scares the life out of me. It sucks and whenever I act on my anxiety, my friends just think it's a weird idiosyncrasy of mine (e.g I hate talking in the Subway and my friends don't understand that. I say it's to be polite but LOOOOL it's because I don't want stranger over there to judge our conversation)