The Doctor is glad that he is a touch flirtatious, that's always a good sign that his mental health is getting better or is positive.

There's a long silence and Ten stops his own hand from just taking the Irish booze, "Look -, I'm so sorry about them but I'm not ready for anything serious. And I'm not sure if I ever will be again outside of her or Jack."

A pause, "If I do flirt with you it's only because I do admire your intellect."