The Vampire Diaries, Season 4

Elena:
Stefan, listen to me. You did the right thing. You did what you always do-- you respected my choice.

Stefan:
And what am I supposed to do if Bonnie can't figure out a way to help you, huh? Because then you'll have another choice to make-- either to let yourself die or become a vampire.

Elena:
Well, then we'll cross that bridge when we come to it. (Chuckles) Oh, my god. Did-- Did I just say "cross that bridge"? (Laughing)

Stefan:
You're laughing. I'm pretty sure you don't actually think that's funny.

Elena:
(laughing) I... I can't stop, though.

Stefan:
Your emotions are a bit heightened today. (Elena continues laughing) A lot heightened. (Elena starts gasping) Hey. (Elena starts sobbing) Shh. It's ok.

Elena:
I'm sorry. I--

Stefan:
Listen to me. No matter what happens, I'm here for you. I can help you.