No. 1 (and probably one of the best ever)
Carrie: I'm looking for love. Real love. Ridiculous, inconvenient, consuming, can't-live-without-each-other love.
Smith: Hey, Babe, I flew back...
Samantha: You flew all night? Why?
Smith: I forgot to tell you something on the phone... I love you.
Samantha: You flew back to tell me that?
Smith: Can you think of a better reason
Samantha: No, I can't. You have meant more to me than any man I have ever known.
*Although I think if Samantha had just stopped at "No, I can't," it would have been better.