Keith thinks that for you, he's the one.  He's self-centered, selfish, sarcastic, he even feels like he loves you sometimes, but most of the time he feels like you're nothing in his life.  He doesn't care when you cry because of him, he thinks that even though he acts like that, you will love him.  he doesn't let people approach you or talk to you.  He thinks it's okay not to comfort you or treat you a little better, after all, you love him, or that's what he hopes.  he is insecure. 