There's such a thing as an outgoing introvert, meaning introverts aren't necessarily lacking in their social skills. Extraversion means you gain energy/recharge by being in the company of people and interacting with them.
If you have times when you gotta recharge by being alone AND by being with people, then you're most likely an ambivert
There's this stereotype that extroverted people are social butterflies but the truth is, some can have their struggles socially as well.
I'm a raging introvert (small talks can almost kill me and it takes a while for me to get into the confiding stage when getting to know a friend better, because introverts tend to place trust above many other things) but sometimes, I'm all for hanging out with people, having drinks or going to a theme park together (some things are better experienced with others). Sometimes, I get extremely excited and freak out with good friends when I get worked up about something, be it inside jokes, discovering that you share a similar passion with someone or just by seeing zombies and explosions everywhere (true story. You should come to Universal Studios Japan on Halloween lol). But, I do get really, really tired by the end of the day even if all we did was sit and talk. And normally, I wouldn't do anything else for the next two days except being cooped up in my room for plenty of me time XD
Apparently There's no such thing as 100% introversion and 100% Extraversion. It's really hard to gauge what you really are. I'm guessing that your social experiences have something to do with it. I'm no researcher of the matter, though XD;; But I do admit that my childhood and teenage years had a history of wanting to make as many friends as possible, emotional bullying, trying to fit in and embarrassing boo boos I've made that shaped my current social anxieties. Must've made me what I am now