Chuck: I can't let my feelings cost me all that I've built.
Blair: Even if it means losing me, instead? All I ever did was love you.
Chuck: The worst thing I ever did. The darkest thought I ever had. You said you would stand by me through anything. This, Blair, is anything.
Blair: I never thought that the worst thing you would ever do would be to me.
Chuck: You went up there on your own.