Who the hell is he for even thinking he could even be with her? She's so fucking special and he's not. This is why he thinks he's just a creep and weirdo. It's portraying a feeling of self-loath, low self esteem.
She could never love him; why the hell does he even try? What the hell is he doing here, he doesn't belong in this game of love with her. He wants to get rid of this feeling of love, since it's not gonna happen anyways.