The Doctor was looking at him as he ate his pizza "My dancing amuses my friends these days, " he remembered when he had danced at Amy and Rorys wedding. He carried on eating and sipped his rootbeer. He was enjoying spending this time with them. He was still blushing when he heard Arwens comment.
He didn't seem to know what to say. He was blushing even deeper. He didn't quite know what to say. He though was eating more of his pizza and he hummed.