Aahg-waitaminute--don't..-stop:shh.
I know what you're going to say. And if I were with you, I'd gently lay my finger on your nose and say, "Pause for just a second."
This does not mean "anti-social." I hear so many people (one in particular springs to mind but that's not my business to tell) who use the label "introvert" as an excuse to sit in their dorm room by themselves and watch "Sherlock" for weeks on end.
Repeat after me: that is NOT what an introvert is.
I love to be with my friends. The nature of my job means going out of my way to ask people how they're doing and if they need my help. I am paid to be "on" whether it's 7am or 10pm. I love to make people smile and hear them laugh. One of my favorite things to do is ask people questions and hear them tell their stories. But just as laying in bed reading a book doesn't make me antisocial, being sociable and out-going (as needed) doesn't make me an extrovert.
Whether your vert leans more toward intro and extro depends solely on where your energy comes from. In my case, I am emotionally and physically drained the longer I'm with people. When I come home from work and sit in my room for an hour by myself, it doesn't necessarily mean that I've had a bad day. (Although everybody in my house knows that if I come home and go straight to the piano, it's been a bad day and I need at least an hour before I'll talk about it.) The need to be alone first thing in the morning or when I get home from extended time away is my way of "recharging." My mom said that it's a bit of an oxymoron to think I gain energy from unwinding, but it's true: I am emotionally rejuvenated after spending extended time doing the things that nourish my soul - specifically reading a book or journaling. Today I walked in the door after an eight-hour shift, changed into my comfy clothes, and went straight out to my porch with a book. I smiled at my mom and said "hello" to let her know that today wasn't a bad day - I simply had a lot of human interaction and needed some time to not be "on."And also because I still can't get over the beautiful weather we're having and I just want to be outside as much as possible after being inside for an eight-hour shift.
The opposite is true of extroverts (though I'm not one and don't claim to be an expert on the subject): their energy comes from being around other people. While I the introvert prefer to just go home after a day at work, extroverts are totally fine with hitting the ground running after a full day of whatever and going out to a club or bar to be social. The label doesn't come from a tendency to be happy and energetic around people, though that's how it's often interpreted. It is, dear friends, all about the energy source.
And that's all I'll say on the extrovert front since, as I said, I'm not expert.
While we're on the thread of debunking assumptions, let me say right here, right now that I'm not naturally a miserable person. I tend to be a little melancholy and "brooding" if left alone by myself for too long, which makes me assess how long I've been alone and plan social interaction accordingly. But you'll rarely find me going out with friends after I work all day: I'm not one of those who clocks out of work and goes out on the town. And if I have something going on after work - whether it's with friends or my family or a colleague - I use the drive to and from as a minute to myself to "recharge," even if it's just for a minute. So while it seems like I'm just writing on my porch listening to country music, I'm actually using this time to get my battery back up after a day of answering questions and helping lost customers and being positive even when I really, really feel like griping. I love doing it, but it's a little exhausting after a while.
And so ends another narcissistic blog where I just talk about myself and you all think that I'm faking being happy - I promise that I'm usually happy these days, and I reassure you that I hate talking about myself and would much rather listen to you talk about yourselves. I hope you're enjoying your Wednesday, dear friend. And if you're not...I mean, the weekend's almost here, that's happy. :-)

