What's a soulmate?

Lilly: What's a soulmate?

Dawson: Well, it's like a best friend, but more. It's the one person in the world that knows you better than anyone else. It's someone who makes you a better person, well, actually they don't make you a better person - you do that yourself because they inspire you. A soulmate is someone who you carry with you forever. It's the one person who knew you, and accepted you, and believed in you before anyone else did or when no one else would. And no matter what happens... you will always love them.

--From Dawson's Creek --