Who said "I swear to God I'm a madman."?

This quote is attributed to Holden Caulfield.

I swear to God I'm a madman. - Holden Caulfield

"I swear to God I'm a madman."

Holden Caulfield

Character in The Catcher in the Rye

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"It kills me. It really does."

"I'm the most terrific liar you ever saw in your life."

"Phoniness kills me. It really does."

"I really do. That's the thing about me. I'm quite the sexfiend."