With you being his roommate, he always flirted with you, trying to make you blush. He always found a way to spend time with you, to tease you to his heart's content. You always thought Natsume only did it, because it was his way of joking. But little did you know that his feelings for you were genuine. All this teasing, brief hand holding and flirting was him giving you hints about his feelings, but you never got them. Natsume always thought you'll only see him as a friend.