You had never been good at dealing with pressure, especially death: whenever someone was in a near-death situation, you would abandon whoever it was and withdraw into yourself. You weren't a bad person, you were the best person Elijah had ever met, but the moment Klaus bit Elijah, and a werewolf bite is lethal to a vampire, you left. You knew Elijah wasn't going to die, since he was an Original, but you couldn't stand it, so you abandoned Hayley and Elijah in the Bayou, ran out and left them there.
You didn't come back, not even when the fever was so high that Elijah was screaming your name and seeing your mirage, not even when you saw the fifty missed calls from Hayley. You waited, and the next morning, when you knew the fever had broken and Elijah was as fit as a fiddle, you came back.
"You're back now?" Elijah said, he wanted to be mad at you but he couldn't, he had missed you desperately. He kept up the angry facade though.