Socialising with muggles - How fast can you call someone your "best friend"?

As you know I work in a not very glamourous field: I'm a Marketing product manager for a French Car-maker. It's not the most thrilling job, not very brain-challenging, but my colleagues are cool, so it's okay.
The thing is that it's a Muggle thing.
It's common, mainstream, doesn't come even close to the cultures I identify to, or to the things I like.
Here, I'm a bit of an Alien, a weird bird.
And one of the things that makes me feel so awkwardly different is quite simple actually. I'm passionate.
Of an incredible number of things.
I love reading, mainly fantasy books, I love sewing, and writing, kniting, dancing, singing, studying. I could talk about those things for hours. They make something resonate in me. I feel whole, I feel excited, and curious. It make my heart beat faster, time flies, my brain works faster.
Someone once said that I glow from inside and I talk with my hands whenever I talk about something I love.
I'm well known for my impossibly complicated and overbooked agenda, and of the incredible number of activities I was take at the same time. That's only because I'm so passionate. If I didn't love so many things, I wouldn't bother with so many activities, events, practice.
The thing is that to me, it feels natural. Discovering new things, and tring to master as many as possible in the shorter amount of time, doing as many things as possible.
So when I talk to people, I'm always astonished when people tell me that the don't have a passion, or a special thing, no personnal project they're working on, be it sewing something, building something, writing something, composing something.
I'm not good at small talk. I want to talk about the way earth moves, about the new scientific discoveries, about colours that don't exist, about what one dreams at night, or what's in one's head.
Talking with people with no passion for anything, whose life is limited to work and party is a weird experience. There is no real conversation, it's just all small talks and meaningless words.
How do they keep busy? What do they do during the week-end?
Talking about the things I'm interested in got me being labeled as a "weirdo", as someone strange, someone that should not be taken too seriously. My opinion is often neglected because "Don't pay attention, she's a weird". In the team, I'm the resident genius. A living-geeky-encyclopedia-of-useless-knowledge.
Not the best way to socialise in your work place.
I could be good at socialising. I'm a good actress. I faked being normal when that was necessary, but I realised that... I'm not "Normal" I'm passionnate. I don't like small talks. I don't like letting people saying things I know aren't accurate and thus spreading ignorance. So I stopped pretending. I just stood right in my shoes and said what I had to say. Talkes about mathematics, about history of fashion, about sewing new costumes, about working on my next novel, about feminism, about symbolism in books, about the coulour of the earth everywhere I've been, I talked about what makes my heart race and watched who listened and who talked back, who joined the conversation, who were the other weirdos.

Socialising is not mandatory. Toning down is not mandatory. Standing out of the crowd can actually be pretty awesome.
My colleagues gave me a nickname. They like me. I'm part of the team, even if my social skills are different than theirs.

On the other side, My stepfather teased me yesterday for calling someone "my best friend" even if I've known him only for a few month.
He said that it was childish. That a best friend is someone with whom you build a relationship over time, over years and that only time makes them a "best-friend".
But To me that description felt wrong. I'm been know for dissapearing from the surface of the earth every few years, loosing people each time. The only ones who stayes were my best friends. my special friends. The weirdos with whom I talked about the landscape in their head, about the way I see the sky. For most of them, they went from stranger to best friend in a very short time, because those are the ones I felt, and I kwen, I had something in common with. We stood outside the crowd together, worked the same way and understood eachother.
I do believe in friendships that grow from barely knowing someone to be as brothers in years. But because we stand out, because we are different and it shows, it's easier to meet people to whome you're close to, to bond with people you have many things in common. I do believe that it is possible to become best friends in two month. Or in two weeks, why not? Because there was some place left in my heart, because even if we don't know each other by heart, we understand eachother on a level far deeper than most. We skip the small talk and go for the "how many galaxies are in your heard?"
I do believe that PM was my best friend from scratch. That from the moment we met, she was different and had a special place. That from the beginning, without knowing her, I knew she was my best friend.
And I do believe that among the new friends I made this year, one of them is indeed one of those special friend. It is. I don't question it. I just know it.