According to Myers-Briggs personality test, we are either naturally introverted or extraverted. It doesn't necessarily mean you either prefer hanging out with other people or by yourself - rather it refers to the determination of your source of energy. Check out this chart and tell me if you are an introvert or extravert.
Tend to be more naturally active, expressive, social.
They talk more than they listen.
They think out loud.
They act and then think.
Are interested in many things, they have many hobbies.
Can sometimes be easily distracted.
Prefer being around people a lot.
They have high amounts of energy.
You are extraverted if being with people gets you excited and energizes you.
Tend to be more reserved, quiet, cautious.
They listen more than they talk.
They think quietly in their head.
They think and then act.
Are interested in fewer things, but with a greater amount of focus and depth.
Have powers of high concentration.
Feel comfortable being alone.
They have quiet, calm energy.
You are introverted if hanging out in a crowd makes you feel tired.