Jem--Jem is all the better part of myself. I would not expect you to understand. I owe him this." "Then what am I?" Cecily asked. Will exhaled, too exasperated to check himself. "You are my weakness." "And Tessa is your heart," she said, not angrily, but thoughtfully. "Not a fool, as I told you," she added at his startled expression. I know that you love her.
Cassandra ClareWill bounded up onto one of the ladders and yanked a book off the shelf. "I'll find you something else to read. Catch." He had let it fall without looking and Tessa had to dart forward to seize it before it hit the floor. - Clockwork Angel
Cassandra Clare