[That's yes/no answer. He didn't want to be over her grave like he had been with Amy and Rory. He needed someone like River Song, who wouldn't die but even she did in the end. The Doctor gives Mulder a slow and sad head nod. There was also the whole thing about Meta Crisis self and needing someone to sit on him. It was the best way to give her what she wanted. He couldn't say that he loved her; though now he might be able too. He already surprised him with saying how he loves Donna's grandfather.]