*sigh*
guys i'm going to offer an opinion that's probably not going to be popular ...
i don't believe that people can be either 'introverted' or 'extroverted' like the way you can have a red crayon and a blue crayon, i believe it's entirely dependent on context. when i was growing up in my african homeland i never for a moment thought i was an introvert. i was shy sometimes, but all kids are shy to a degree, but with my friends i was just myself.
when i moved to north america and was in unfamiliar terrirory i withdrew. instantly i started calling myself an 'introvert', and started wrapping my identity around this label. overtime i made friends and somehow i didn't feel like an introvert anymore & the label didn't make sense. however, we moved to an all-white area, where i stuck out and it made me feel awkward. white people (& to a lesser extent minorities who've been raised in north american culture) socialize very differently from africans and south asians. (NOTE: maybe it's just whites in north america, not sure about europe). they tend to be more reticent and guarded in their conversations, that's why 'small-talk' is such a chore. nobody ever says what's really on their minds, it's all scripted bs.
when i went to uni and gradually got into contact with different people hailing from different parts of the world (& also people with different interests) i gradually realized that *I* didn't have a problem. the reason i was withdrawing from people was because i didn't feel comfortable with them. whenever i'm with black people or with africans, or people of other races who're just chill, i'm chill too. but stick me in a party filled from top to bottom with hipsters and peckerwoods and i'll instantly be the most awkward person in the room. that's what happened to me yesterday. i got randomly invited to a party and i was like, *hmmm party? cool. i love meeting new people. should be interesting*. as soon as i got there, i was like *oh shyt, this wasn't what i was expecting*. i was house-plant status, stuck to a wall, looking at my phone trying not to look bored. i had conversations with a few people but they were all pretty wack. that's what got me to thinking. in my head, i know i'm not an awkward quiet person, because i have a wide group of friends (albeit all of black, south-asian origin), but in that particular context i felt like i was in high-school again.
i'm not saying that certain people don't prefer to keep themselves. i'm just saying that be careful before you label yourself. look at the sort of company you keep and assess your comfortability level. it might be that your quietness is just a way for your body to tell you to drop yoru current squad.
i mean its 60 40 to me. its like if im in a place with things im familiar with or with people i know im comfortable. its like being a shadow on the wall. or a stray cat. i remember going to a birthday party and i was paranoid. i thought, who are these kids. it was just people i never met in my life. then i saw one friend i knew. honestly i avoided most people and i would make good conversation with her and she became a funnel for the people i didnt know and i was able to kinda use her as a wingman to pretty much prevent me from falling on my face. now im in college and its like being lost in a jungle. once in a while my friend will show up, whos the exact opposite of me. he can engage in conversation with just anyone like its nothing. and thats the ability i wish i had. like jekhyll and hyde. to be able to emerge from my home and go out without a care in the world. i hang out by myself alot and write. its been always more of a wanting to be left alone thing for me. and ive honestly ditched crowds alot. id disappear without a word.

when i say i'm busy and that i have work to do. what kind of fukkery is that
because i'm the only black person among my 5 circle of friends (they mainly hispanics with 1 white boy) at this point i just want to be filthy rich so me and my closest friends can eat and be happy for the rest of our days
fukk anybody else that tryna holla at me after i get this money