Ryunosuke wasn't contactable, even if he loved you, even if he admired you. He didn't like that your ability nullified his ability, making him helpless, plus hugging was just out of character for him. Mostly any catalyst for touching was you, except on rare occasions.

Sleepy Ryuunosuke was a sticky mess. Though his sleep schedule was strict, you would occasionally see him in a drowsy state. Akutagawa was late returning from his mission, but he still got up as usual and felt like a boiled potato instead of a human being. While you were standing in the kitchen trying to prepare breakfast so that your dish wouldn't be considered a chemical weapon, Ryunosuke suddenly entered the kitchen.

"Dazai" he spoke in his usual quiet husky voice, suddenly coming over and snuggling up, grabbing your shirt m snuggling into your shoulder