You've been trying to help Chifuyu to destroy Toman by your own will. He was not excited having you engaged into organisation's dirty doings, but he's left no choice. He pushes you away for you own good rejecting your two obvious feelings and crave. He knows what he's going to do and your death is completely not in his plans.

Alternative

You managed to stay by Chifuyu's side, your feelings came out stronger than the need to stay away as far as possible when Toman had just begun to rot with everyone in it noticeably. Everyone, but Chifuyu, he still loves coming home to finally release with you after all of the dirty days he had had. You can see him suffering because of it, but you noticed yourself how your presence worked on him.