sobs.

Blair: Changing your name doesn’t change who you are.
Chuck: It’s a good start. A chance to live simply, earn people’s respect, maybe become a person someone could love.
Blair: Someone did love you. And… you owe it to her, and everyone else you’re leaving behind not to run away. Which is what you’re doing. And I don’t think that great man you’re talking about wanting to be is a coward. I think he would face up to what he did.
Chuck: I destroyed the only thing I ever loved.
Blair: [takes a deep breath] I don’t love you anymore. But it takes more than even you to destroy Blair Waldorf.
Chuck: Your world would be easier if I didn’t come back.
Blair: That’s true. But it wouldn’t be my world without you in it.

TRIPLE SOBS. My heart died when i watched this part.
This is what the Blair/Chuck story can do to you. It can DESTROY YOUR HEART.

Oh and adding to that, the song that was playing during this dialogue made the mood:  I’m In Here (Piano/Vocal version) - Sia