Well, it’s like a best friend but more it’s the one person in the world that knows you better than anyone else, that 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… who knew you and accepted you and believed you before anyone else did. Or when no one else would. And no matter what happens, you’ll always love them. Nothing can ever change that.