Trust,
is when you tell someone your deepest, darkest, secret, and know that they'll take it to their grave unless you give them permission to do otherwise with it.
It can be quick, it can be a split-second decision, but it's something conscious, a small act of faith.
Friendship,
is when you tell someone your deepest, darkest, secret, and they stay standing beside you.
It's built on at least some amount of trust, and it means they back you up, and you do the same for them. It means you do your best not to stab them in the back, because you care about them, and trust they'll do the same for you.
Love,
*is when you tell someone your deepest, darkest, secret, and they look you in the eye, and believe you're still a good person.
It sneaks up on you, about the exact time you don't expect it to, and changes your life, rather you want it to, or not. It's unconditional, and infinite, and beautiful, because love is when you care about someone so much, you can't imagine your life without them, and you'd do anything to protect them, your own life be ******. It doesn't matter if your blood is the same - if you're friends, or lovers, or acquaintances. Love, is an all encompassing sort of thing: it isn't picky.