Three words. Eight letters.

Chuck: Please don't leave with him.
Blair: Why? Give me a reason... and "I'm Chuck Bass" doesn't count.
Chuck: 'Cause you don't want to.
Blair: That's not enough.
Chuck: 'Cause I don't want you to.
Blair: That's not enough.
Chuck: What else is there?
The true reason I should stay right where I am and not get in the car. Three words. Eight letters. Say it... that I'm yours.
Chuck: I... I ... [pause]
Blair: Thank you. That's all I needed here.