Alice Hoffman said this quote

As for Gus, he had come to Haddan with no appreciation for the human race and no expectations of his fellow man. He was full ready to confront contempt; he'd been beleaguered and insulted often enough to have learned to ignore anything with a heartbeat. Still, every once in a while he made an exception, as he did with Carlin Leander. He appreciated everything about Carlin and lived for the hour when they left their books and sneaked off to the graveyard. Not even the crow nesting in the elm tree could dissuade him from his mission, for when he was beside Carlin, Gus acquired a strange optimism; in the light of her radiance the rest of the world began to shine. For a brief time, bad faith and human weakness could be forgotten or, at the very least, temporarily ignored. When it came time to go back to their rooms, Gus followed on the path, holding on to each moment, trying his best to stretch out time. Standing in the shadows of the rose arbor in order to watch Carlin climb back up the fire escape at St. Anne's, his heart ached. He could tell he was going to be devastated, and yet he was already powerless. Carlin always turned and waved before she stepped through her window and Gus Pierce always waved back, like a common fool, an idiot of a boy who would have done anything to please her.