Who said "Isn't it funny how some people like to be alone?"?

This quote is attributed to Charlie Brown.

Isn't it funny how some people like to be alone? - Charlie Brown

"Isn't it funny how some people like to be alone?"

Charlie Brown Solitude

"Good grief!"

"I got a rock."

"Rats! I did it again."

"Why is it that everything I do turns into a disaster?"

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."