[His brow creases as he scales back from his quick answer to a more considered one.] I don't trust him with her. I...want to trust her. [But he knows people don't always do what's best for them when it comes to this kind of thing. He doesn't have to look any further than himself for that. Maybe no one could have stopped him from being with Ruby, but it was a mistake and not one he can just chalk up to character building considering what happened. He doesn't think Elena being with Damon is going to bring about the apocalypse, but it doesn't need to be the apocalypse to be bad.]