This article seems to use the popular definition of extroversion and introversion (i.e. someone who enjoys socializing vs. someone who doesn't). This is surprising, seeing as the author is a psychologist and the article is published on Psychology Today, because it's well established by now that introverts find socialization tiring, while extroverts recharge their energy by interacting with others.

I'd love to know if it's possible for an introvert to change so that socializing gives them an energy boost rather than draining them. Sadly the article doesn't seem to answer that, and the solution is probably a little more complex than just wanting to socialize more.