The Vampire Diaries, Season 3

Damon:
Can we not do this right now? I'm having a really bad night.

Elena:
All summer, every single time I came to you with a lead, you made me feel like an idiot for having hope...

Damon:
You were an idiot. (pauses) We both were.

Elena:
Tell me what you know, Damon.

Damon:
I need you to get back to your party, Elena.

Elena:
We're supposed to be in this together. Why didn't you tell me that you've been tracking Klaus's victims?

Damon:
Because they're not "Klaus's victims", Elena, they're Stefan's!

Elena:
...What?

Damon:
He's left a trail of body parts up and down the eastern seaboard.

Elena:
No. You're wrong.

Damon:
I've seen it happen before. He's flipped the switch; full-blown ripper.

Elena:
Stop it, Damon.

Damon:
No you stop it, Elena. Stop looking for him. Stop waiting for him to come home. Just stop! Stefan's gone and he's not coming back. (pauses) Not in your lifetime.