Elena: You put me in a position where I have to defend you, again, where I have to bend my morals, again. Where I have to go against every single thing that I believe in, again, because I love you! 
Damon: Then stop loving me!
Elena: I can't! 
Damon: Well, that's the problem! We don't work! 
Elena: I know..
Damon: Then we agree? This has to end. 
Elena: It just did. It's over.. We're over.