Who said "I could be friends with you, but I choose not to."?

This quote is attributed to Cartman.

I could be friends with you, but I choose not to. - Cartman

"I could be friends with you, but I choose not to."

Cartman Friendship

"Screw you guys, I'm going home!"

"I'm not fat, I'm just big-boned!"

"You will respect my authority!"

"Hippies, they're everywhere!"

"Friendship is built on trust and honesty."

"True friendship is worth more than gold."

"Good friends are like stars, always there even when you can't see them."

"Friendship means sacrifice."