"You were daggered, Kol, and I had no idea when you would be brought back. I had to move on with my life, because grieving you was becoming too hard. It hurt to think it would be centuries until I saw you again, and if I had tried to live with that pain for any longer then I had...."
"You would of turned it off. I understand that, sweets, I do. But you cannot just act like you no longer feel anything for me. Like what we had was nothing"
"I am acting like this, because if I let myself fall back into your arms, and then something goes wrong... I don't think I could stand the thought of loosing you again"
The Vampire Diaries
Seasons 3 - 4