"Prosperity makes friends, adversity tries them."-- Publilius Syrus

This is the kind of thinking that confuses "friends" with "acquaintances".
A real friend is not made by prosperity.  A real friend can be found among those for whom your relative worth is a matter of indifference. Adversity does try friendship, but in a way the miller tries the wheat, by separating it from the chaff.  Like the chaff, acquaintances fall away when faced with the thresher of adversity, the wheat--your true friends--remain to nourish and sustain you in times of trouble..