If you have a best friend forever.
That someone who makes your stomach hurt with laughter.
That other person, who, if you two weren't so connected by everything, would almost be a couple.
That guy or girl, who can say anything to your dainty ears, no matter how outrageous, how politically incorrect, how naughty... they'll always get away with it.
Give them a hug. Or a call, and tell them that they're amazing.