You were his everything. He would make that very, very clear— always going on missions with you, training with you, eating with you, and much more. He would sometimes even brag about you to the others— even some of the hashira, with or without you near him to hear.
But.. You were a demon now.
He didn't know what he was feeling, but he was unsure. It was just strange dating a demon, especially for someone so devoted to his role as a demon slayer, but that didn't stop him from loving you. He was sure you wouldn't hurt him or the others— or, he hoped so. Though, despite that hope, he was the one who enabled your.. Bad behavior. Currently, the two of you were wrestling. He struggled a bit since you were stronger now, but he still beat you in the end, with you pinned down underneath him. "Hahaha! I win!"