Second

Elena: You are being ridiculous.
Caroline: And insecure and stupid, but that doesn’t change the fact that Matt is always gonna be in love with you.
And I’m always gonna be the backup.
Elena: You’re not a backup.
Caroline: Yes I am. I’m Matt’s Elena backup. I’m your Bonnie backup.
Elena: Now it’s about me and Bonnie?
Caroline: You don’t get it. Why would you? You’re everyone’s first choice.