Stefan and Elena in “Unfinished Business”

Stefan

So, uh, what's up?

Elena

Honestly, Stefan, I just wanted to thank you for sticking by me when I was at my worst, for believing that I was still in there. Even after everything I put you through, you... you never gave up on me.

Stefan

I, uh, I kind of owed you one.

Elena

Here. It's yours. I want you to have it.

Stefan

[opens hand to reveal the cure] No, Elena. I'm not--

Elena

Stefan, the only person worse at being a vampire than me is you. Human blood is your downfall. You got the raw end of the vampire deal. The rest of us will be fine. We'll survive. I mean, you taught us! You deserve whatever you want out of life. You deserve this.