Sirius Black

You've been together for 2 years. And he apparently forgot about today's anniversary, which isn't so strange, because Sirius doesn't care about rules or dates. He lives one day at a time. He forgot because he and James found a new joke...

Sirius is lounging in the living room, his feet up on the armchair, and you sit on his legs. He smirks. "Oh, hi, beautiful." When you remind him about the anniversary, his eyebrows rise and he sits up abruptly. "Damn. I really forgot. But I'm not going to give you books like Remus." Then he turns into a dog, and you spend the whole evening lying together on the couch...