What is a soulmate?

"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. Actually, they don't make you a better person, you do that yourself because they inspire you. 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. A soul mate is someone who you carry with you forever. And no matter what happens, you'll always love them. Nothing can ever change that"