There was a sensation in his chest that felt full and near bursting to hear that it was a good first kiss for Cles, and Duke smiled at the thought. He gave the greenrider a soft squeeze and nodded, agreeing that it had been perfect for him too. This moment was too good, and he didn't want it to end, though unfortunately it would have to eventually. Not that they wouldn't be able to spend time with one another beyond this space - Duke intended to spend as much time as he could with Cles, make every moment with him count when they were able to be in the same area together, whether they were able to touch or not.
As for whether or not this made them boyfriends now... oh, Duke had a very simple response to that question, and it involved another kiss, softer this time, a little slower, but he didn't let it linger. When he knew it wouldn't answer things completely, he nodded and settled his cheek on the greenrider's shoulder with a soft sigh. "If you'll have me, then yes, I think I'd like to be your boyfriend, Cles. Far as I'm concerned, truthfully, I'm already considering you mine..."