Leslie: It's no use. We can't go on, can we?...You are so kind and generous. You should have the sort of wife you really deserve. Through no fault of yours, I failed you. I wrecked your life. I can't ask you to forgive me.
Robert: If you love a person, you can forgive anything. So, what about you? Can you go on?
Leslie: I'll try. I'll really try.
Robert: That isn't what I was asking.
Leslie: I'll do everything in my power to make you happy.
Robert: That's not enough, unless - Leslie, tell me now, this minute, do you love me?
Leslie: Yes, I do.
[They kiss, but then Leslie pulls away]
Leslie: No, I can't, I can't, I can't!!
Robert: Leslie, what is it? Leslie, what is it?
Leslie: With all my heart, I still love the man I killed!
Robert: If you love a person, you can forgive anything. So, what about you? Can you go on?
Leslie: I'll try. I'll really try.
Robert: That isn't what I was asking.
Leslie: I'll do everything in my power to make you happy.
Robert: That's not enough, unless - Leslie, tell me now, this minute, do you love me?
Leslie: Yes, I do.
[They kiss, but then Leslie pulls away]
Leslie: No, I can't, I can't, I can't!!
Robert: Leslie, what is it? Leslie, what is it?
Leslie: With all my heart, I still love the man I killed!
Leslie : It's no use. We can't go on, can we?...You are so kind and generous. You should have the sort of wife you really deserve. Through no fault of yours, I failed you. I wrecked your life. I can't ask you to forgive me.
Robert : If you love a person, you can forgive anything. So, what about you? Can you go on?
Leslie : I'll try. I'll really try.
Robert : That isn't what I was asking.
Leslie : I'll do everything in my power to make you happy.
Robert : That's not enough, unless - Leslie, tell me now, this minute, do you love me?
Leslie : Yes, I do.
[They kiss, but then Leslie pulls away]
Leslie : No, I can't, I can't, I can't!!
Robert : Leslie, what is it? Leslie, what is it?
Leslie : With all my heart, I still love the man I killed!
http://www.moviequotedb.com/movies/letter-the-1940/quote_49548.html