Pretty much it.

Evil. All said. Still, if you lay your head down, and spare a few thoughts in her name, you'll like her. Because that's how it works, right? Somehow, at first, you don't see what's good or interesting in someone, but you'll get to learn all that stuff. Then, when you know everything (or at least that's what we like to believe, that we know everything) about that person, you don't get the chance to separate it from you. It haunts you. It will follow you everywhere. But it is not the person who follows you, it's the idea you might have about that person, how you feel about it (her). Even though you don't quite like that "everything" that you know, there's a certain attraction to her being. Even though she's evil, and you know it. Even though she knows she's evil, and she knows that you know it, and she grins cheering that fact. Evil is the word that sounds the best describing this "everything" that I know.