Ford: [laughs] But if she says, “I love you,” and I say, “I know,” it’s beautiful and it’s acceptable and it’s funny.
Kershner: [laughs] Right. Okay. Now, I only have one big problem here. 
Ford: But I also have to say to her, “Don’t worry about this,” in some way. 
Kershner: No, you can’t. You can’t because you don’t know whether this is the end or not. 
Ford: The point is: I’m not worried about myself anymore; I’m worried about her.

The Making of Star Wars: The Empire Strikes Back