One definition of extroversion/introversion is that extroverted people gain energy from social interactions and introverted people spend energy. Introverted people may enjoy socializing and be willing to spend energy on it, but eventually the tank will run dry and they’ll need to recharge.

Growing up I definitely considered myself an introvert, but in the last few years I’ve suppressed that part of my personality to build social skills. I’ve worked on “being Alpha” and getting attention.

I’ve recently become friends with a few people recently who are very in touch with their introversion: they are socially adept and enjoy doing stuff, but quite deliberate to schedule “Me Time”. They’ve inspired me to accept my introvert tendencies.

My all-time favorite Cary Tennis article is this one where he, as an extrovert, extols the virtue of introversion:

Have physical presence. I’ve heard this behaviour described as “being Alpha”. It can be more socially effective to have quiet physical presence than verbal presence (to misquote: “sound and fury signifying nothing”).
…
“Oh, to be an introvert, full of impenetrable depths!” Playing with your cards close to your chest is an asset. If you open your mouth less, people should treat your words as more important when you do (provided you retain the ability to make yourself heard). It’s okay if people get the impression that you’re judging them if you seem to be doing so without an agenda.
…
Are you jealous of the interaction extroverts get, or the attention? Introverts can get interaction. Introverts probably don’t actually have a use for attention.

His advice to a stepmother who needs time away from her stepkids is also excellent.