I feel like Elena tries to turn Damon into Stefan. With the compulsion scene in season 4, she used the same speech she did on Stef, like she needed to justify her love for Damon by him fighting compulsion. And when she heard Stefan wanted to take the cure and grow old with her, she used the same speech on Damon. Same with the future speech. But Damon always shuts her down. When will she open her eyes??