"So Happy For You!"

The Big Bang Theory, "The Bon Voyage Reaction"

Stephen Hawking is sending an expedition to the North Sea to test his theories; one of the experimental physicists dropped out, giving Leonard the opportunity. 

From the beginning, Sheldon has been attempting to talk Leonard out of it; in typical Sheldon fashion, he predicts doom, citing the possible hazards of boat travel, even going so far has to hint how the four-month separation might affect Penny's affection for Leonard. 

Sheldon continues to sulk; Leonard believes it is because Sheldon is terrible with change, and worries about him. But it's Penny who calls him on it: 

Sheldon: You know, I have to say, Penny, I don’t understand why you of all people are encouraging Leonard to do this. 

Penny: Honey, this is a big deal for Leonard, okay? He gets to work with Stephen Hawking. Who, by the way, will not be on the boat. I checked it out. 

Sheldon: It’s not that big of an opportunity. And even if Hawking’s theories are correct, all they prove is where the universe came from, why everything exists and what its ultimate end will be. I mean, me? I’m interested in the big questions. 

Penny: Oh, my God, Sheldon the genius is jealous of Leonard. 

Sheldon: I’m not jealous. I’m just very unhappy that good things are happening for him and not happening for me. 

Penny: Look, sweetie, this is a natural thing to feel, okay? But just because good things are happening to Leonard doesn’t take anything away from you. You know what? Let me tell you a little story. Once there was a girl who worked at the Cheesecake Factory, and she wasn’t very good at her job. 

Sheldon: It was you. 

Penny: It wasn’t me. But she was also an actress, and we were both up for the same part in a toothpaste commercial. She got it. Look, I was so jealous. But instead of ripping out her fake blonde hair… 

Sheldon: You ripped out your own fake blonde hair. 

Penny: I looked her in the eye, smiled and said, I’m happy for you. Because that’s what friends do. 

Sheldon: They lie so they don’t look petty. 

Penny: Yeah. 

Sheldon: How?

Penny: Like this. (Fake smiling) I am so happy for you.

Sheldon: Wow. No wonder you didn’t get that toothpaste commercial.

Later, at Leonard's going away party: 

Sheldon: Um, can I have your attention, everyone? (Clinks glass) That’s, uh, B-flat, for those who don’t have perfect pitch. I would like to propose a toast to my best friend, Dr. Leonard Hofstadter. He has been presented with a wonderful opportunity, and I couldn’t be happier for him. 

Leonard: Thank you, Sheldon. That must’ve been very hard for you to say.

Sheldon: Well, I mean it. I’m really happy for you. And that’s how you get a toothpaste commercial. Cheers. 

For a better boost on being happy for others, I recommend this Chevi Garfinkel shiur (the link won't work unless you are a girl already in possession of a torahanytime account confirming that fact. Yeah, I know).