Sometimes you run across those 'best friends' who really aren't- they stab you in the back repeatedly...but in that case, you dump them and move on.
Though, sometimes, you find 'the one.'
It's incredibly similar to being in a relationship...but these people may or may not drive you as crazy.
You can confide in a best friend, make stupid silly mistakes and they wont care, share your pizza with-without them caring about sharing germs, and always remind them that you will win the burping contests.
You can share clothes, ideas, stories, and secrets, and they'll share them with you, too.
best friend: what?
me: you took some of my pizza.
best friend: who cares? *steals the rest of the pizza*
me: FUCKER! but i love you anyways
best friend: you betta'
2 Girl best friends: They do all the girly things together, no one says anything.
2 Boy best friends: They do all the boy stuff together, no one says anything.
1 Boy + 1 Girl best friends: They do boy and girl stuff, People says lots of stuff
Gun Man: I’m going to kill your best friend miss
Stu: No take me instead!
Your real, true best friend is your comfort zone.
In some cases, the two or more part doesn't apply. It is quite possible to be your own best friend.
You have ''in'' jokes that no one else can get, but you still find as funny as ever =) You don't have to pretend around them, they like you for who you are.