"Taking advantage of...?" he questions. Truly, it hadn't occurred to him that way. The logistics of it, certainly, with Byleth being his professor and therefore in a higher position. Yet, he knew Byleth's character and that he wouldn't use it to his advantage for such a thing as taking advantage of any of his students and especially not Dimitri himself.

"You don't have to worry about that. I trust that, regardless of our roles, it was probably... inevitable. Being so close in age, for one, and just the strange circumstances of everything as another only bringing us closer." How Byleth came to be appointed professor, all that came after, and so on. "But I also understand the discomfort, so- Just let me know where the lines are. I won't cross them." Another moment where all he wishes is to be eighteen not just to take the throne but be considered a true adult.

And with that said, there now does come the news of- Oh. "Who?" he asks, firstly. "N-not that you have to tell me. If you don't want to. It's just- I am curious. I don't doubt your judgement in choice of partner or anything like that. Merely, I want to make sure that they'd also, well, like me." That they could all get along and there would be minimal issue. The last thing Dimitri wants to do is stop Byleth from following his heart, after all.