You can be an introvert and be talkative, and you can be an extrovert and be shy.
It's all how you recharge your social battery.
I consider myself to be an introvert, but I'm very talkative in social situations. Sometimes I can't shut the fuck up. When I'm done hanging out though, I'm sitting in a dark room for a few days playing video games not hanging with anyone.
I worked with a guy who drove 50 miles to come into the office just so he could be around people, but hardly said anything to anyone.
Whenever I see something like this I feel I must defend my friend who's a cop.
Before being a cop he was a lifeguard at a beach and my bassist.
Baywatch may tell you differently, but being a lifeguard is a seasonal job, and not a career. The next level of being a lifeguard is becoming a cop, so he did, and he has only beaten one black man so far.