[This is something of a surprise. Dorian had been aiming, perhaps, to make Louis a little uncomfortable, but instead, Louis relaxed. The same aim was achieved: he has learned something about this man. And given how willingly Louis opens up to him once he has been exposed, Dorian thinks he has a tentative answer to whether he's a potential rival or a potential friend.

He offers a smile.]

You must never apologize for feeling something natural to you. Your gentleman friend is very well-intentioned, if perhaps a bit misguided, but you are more than entitled to a breath of fresh air and a bit of quiet, if you would be so good as to accompany me outside--only for a few minutes, of course.