“I’m not in love with your Suit, or your abilities, but the man underneath.
I am glad she said this, although I think Clark already knew this. She told him she loved him before she knew CK=SM.
I’m trying, and clearly failing to say, is that when you meet your soulmate, you want your happily ever after to start as soon as possible. Can’t you believe that?”
Clark:Then why did you reject my proposal?
“Yes. Yes! A thousand times ‘yes’,” she announced, throwing her arms around his neck and kissing him.

She just agreed to run away with him. This is the best development ever.