Leonard: Are you jealous?
Penny: I know, I know, I shouldn't be. He's super sweet. I should be happy for them.
Leonard: Oh, it's driving me crazy, too.
Penny: Really?
Leonard: Yes. I was trying to pretend like it wasn't so you wouldn't think I was petty.
Penny: Wha-- turns out we're both petty.
Leonard: I love you so much.
Penny: Aw.