Who said "Squidward is my best friend, even if he doesn't know it."?

This quote is attributed to SpongeBob SquarePants.

Squidward is my best friend, even if he doesn't know it. - SpongeBob SquarePants

"Squidward is my best friend, even if he doesn't know it."

SpongeBob SquarePants Friendship

"I'm ready!"

"Ahahaha! I love you."

"The best time to wear a striped sweater is all the time."

"I'm a goofy goober, yeah!"

"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."