"I only smile for you." The only person who earned one, who got a proper one. The only person who cared about him and liked to see him happy deserved to see his smile. "You're my only happy thought." Whenever they had a class and they were told to think of their happiest memory or their favourite moment, his was Sirius. And Sirius was also some of his worst memories. Like today. Like anything with James. "You will always be my happiness."