Disclaimer: I do not own the rights to "The Office."
Pam totally wasn't jealous of Karen. She couldn't be -- there was no way she could be, right? There was no reason. Sure, Karen was beautiful and stylish and funny and she was dating Jim, but they were friends, you know? And it wasn't like Pam had any claim to Jim. It wasn't like magically, just because she'd called off her wedding, everything that had happened between her and Jim on Casino Night just went away.
So she shouldn't even care at all if he dated someone else, even if it was someone that worked in the office and she had to see them flirting and holding hands and going out to lunch and kissing good-bye at the end of the day.
Pam wasn't jealous. She didn't think jealousy made you feel like you were going to cry.