I'm clearly not who you think I am, I have no idea who you are, so there's no reason to be looking at me like that.

Straight.

[It's only neat and simple because he fully intends to cut all of this off at the quick. She was here before - there will be plenty of people happy to see her, who know her and are willing to help her settle in. Dean isn't one of them and he has no interest in being one, especially not knowing what he knows.

It isn't why he wants to distance himself, but it's an easy enough explanation, one others will believe readily enough that he'll let it stand as long as it will.]