Why is he pretending to be nice after he used me for sex?

He is saying sorry for everything and telling me I'm a good person, trying to play the nice guy right now. But I know he's really wanting me to take a hint and go away. Why at all would you say nice things like you didn't use me? He is acting as if we might be cool again. But I know its done. Why is he doing this?

Why is he pretending to be nice after he used me for sex?
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