"Except you don't have to fight them alone," she said softly. "Being the Doctor is who you are, and yes, some parts are an act, some parts are a lie, but at the hearts, you are you," she said. "and if you need to let the parts that are too hard fall aside for now, do it. I'm here, I can carry some of that load, for a time, but only if you let me."

A lie, of course. She can and will do whatever she can to protect him, even if he doesn't let her in willingly. She loves the man too much to let him freewill himself into an early (um... what?) grave.

"I will help with the demons, and with the load, I am here until we fix things and I go back to die. Until then... I am here. And even after...."

She let go of one of his hands to touch his chest, between his hearts, "I am here. If you're ever lost or confused, think... What would River Song do? Then do the opposite."