But beware how you presume on an appearance of indifference, which is nothing but conceit in disguise.

The ruling passion of civilized humanity is, Conceit.

You may try the regard of your dearest friend in any other way, and be forgiven.

Ruffle the smooth surface of your friend's self-esteem--and there will be an acknowledged coolness between you which will last for life.

Excuse me for giving you the benefit of my trumpery experience.