Ryoji's really not selfish, as least as far as dragons go. He thinks he's been very good about giving Kai his space and learning when he should stay away because Kai was busy and when he needed to visit because Kai was stressed. But this time there is the definite implication that if he leaves, he won't be able to come back, and that's something he just can't deal with.

"I don't think that's good enough, for me," he says softly. He knows it isn't. And...proving his point, in a way, he leans in and kisses Kai.