Who said "In love, I have been constant and true"?

This quote is attributed to Charles Darnay.

In love, I have been constant and true - Charles Darnay

"In love, I have been constant and true"

Charles Darnay Love

Character in A Tale of Two Cities

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"There are depths of tenderness in her, which I have believed to be wanting"

"I am reconciled to your father now"

"Love is a strange thing"

"We are not machines of wood and iron, but creatures of passion and principle"

"I love my wife, but sometimes she drives me crazy."

"Love conquers all obstacles."

"Love is patient, love is kind."

"I'm not stupid, I'm just in love!"