All his faults are such that one loves him still the better for them.

Affection does not work by tallying qualities. Past a certain point the ways somebody falls short become part of what you recognise them by, and a corrected version would be a stranger. That is the difference between admiring a person and being fond of them, and it does not transfer to people you only know at a distance.

Think of the person you are closest to and name one fault you would not remove. Tell them you do not mind it, in whatever words fit. And consider whether the person you have been hardest on lately is held to a standard you do not apply to anyone you love.