[As soon as Dean says those three words - the three words that he was about to say when Dean interrupted him - he looks stunned. Billie is still pounding at the door, which distracts him for a moment, but then he's looking back at Dean.]

I don't understand...how did you...?

[Did Dean just know all along? Had he suspected his true feelings?]

Dean...there isn't time.

[There's an urgency in his voice as his tears slip down. Dean has to let him do this. And then Dean's tears are also spilling and this isn't what's supposed to happen.]

She's going to kill you, Dean. You said it yourself. I won't let you die. If you know how I feel then you know I can't.