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So when Sasuke says "You have nothing to do with my sins." (Frame 7) meaning that she was not a sin in his life, and how she shouldn't help him pick up the pieces of his mistakes and wrongdoings.
He doesn't regret Sakura, and someone he loves definitely doesn't belong on an atonement journey where you should not find happiness. He needs to reflect of his current person and build up. For example, leaving without an arm or a companion.
And then he see's that she fells dejected and motions 'I love you.' Some anti's see this a way to 'brush her off' and easily say "Get the fuck away. I don't want you here." It's not a vacation.
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Basically Sasuke is saying that she shouldn't be enjoying everything now, moreover telling her that she shouldn't burden herself with his mistakes in the 'rebellious teenager phase'. He needs to find himself and then he can come back for her to start their journey, and do that.
