The Big Bang Theory, Season 6

Penny:
Hey. Shouldn't you be out with your gang spray painting equations on the side of buildings?

Leonard:
Come on, I'm sorry.

Penny:
I just can't believe you don't trust me.

Leonard:
I feel…Of course I do.

Penny:
Then why did you embarrass me in front of my friend who, by the way, knew exactly who you were.

Leonard:
Really?

Penny:
Your picture's on my refrigerator!

Leonard:
Oh. You know, I'm really starting to not like this guy.

Penny:
What is your problem? Do you use up all your thinking at work and then have none left over for when you get home?

Leonard:
I don't know. It's hard sometimes. Everywhere you go, guys hit on you, even if I'm standing right there. And they're all taller than me. WHY IS EVERYONE TALLER THAN ME? You know what, this is all in my head. It's my problem, not yours.

Penny:
Leonard. Why do you always do this? Listen to me. You are the one I'm with. You know I love you. So would you please relax because you are driving me crazy!

Leonard:
[pause] You know that's the first time you said that you love me.

Penny:
[stunned] Yeah.

Leonard:
We're supposed to pretend it's not a big deal?

Penny:
That's … exactly what we're going to do because you're about to make me cry and we both know that if I start crying, you're going to start crying.

Leonard:
You're right we should…

Penny:
Fine! [Runs down stairs]

Leonard:
[Enters apartment] She loves me.