I interact with lots of people. Meet new people all the time. I just don't need to be around people all day and it's not a shy thing where people think you're terrified of interaction, it's just draining like you said. Lots of introverts can turn on the charm when needed.I'm an introvert that used to be more extroverted and man, I still manage to talk to people but shyt. Hell I'm networking right now and it's fun for what it is but still, it drains the hell out of me.