Damon: There's something you should know. Stefan didn't screw us over, well he screwed us over but he had a good reason. He saved Klaus to save me.
Elena: What? Why would he even do that?
Damon I don't know... I feel like such an idiot.
Elena: Why?
Damon: For thinking that for one second I wouldn't have to feel guilty anymore.
Elena: What are you talking about? Guilty for what?
Damon: For wanting what I want.