Cassandra Clare said this quote

Sometimes he wondered if he did these things just to test himself. To see if the feelings had gone. But they had not. When he saw her, he wanted to be with her; when he was with her, he ached to touch her; when he touched even her hand, he wanted to embrace her. He wanted to feel her against him the way he had in the attic. He wanted to know the taste of her skin and the smell of her hair. He wanted to make her laugh. He wanted to sit and listen to her talk about books until his ears fell off. But all these things he could not want, because they were things he could not have, and wanting what you could not have led to misery and madness.