"And you will be happy, David." to "I’m so happy right now."
When Kurt said, “And you will be happy.” David made that little gesture of please take my hand, make me happy. Kurt doesn’t take his hand. However, in the next episode he says, “I’m so happy right now,” and Kurt takes his hand. Not only that, but he was the reason why he was so happy.
David wanted Kurt to be the one to make him happy on Valentine’s day and while he didn’t that night… He finally did by giving him hope.
David made Kurt happy and Kurt made David happy.