AIO for rejecting him

Me and him have been together for more than two months. He had brought up this conversation before as a joke and I've showed my distaste for it. I knew sooner or later, he'll ask it seriously. I've been accepting his various kinks in the past days that even led me to having UTI and taking multiple pills. This was the only time I wanted him to accept the boundaries I've set-up but it seems he's reluctant to even accept it. Outside of bed, he's an amazing man. I won't go detail but he makes me happy. Though, this conversation alone has made me grow uncertain with the state of our relationship.