I'm not crying. You're crying. Just imagine how twelve would react to her hugging him. She'd wrap her arms around him, and he'll be sorta shocked at first and just do that awkward thing where he doesn't know what to do with his arms and then she'll say it and just imagine his face as he hugs her back because now he knows why he never knew where to put his arms- they were around the wrong person.
I love Peter Capaldi as The Doctor. He's such a wonderful actor, and he's done a beautiful job with the role in spite of the crappy writing they've given him to work with for some of his episodes. He still manages to be The Doctor through it all. I hope he gets to have nothing but wonderful writing from now on. But, either way, I know I'll be very sad to see him go whenever they have The Doctor regenerate.