Unconditional confidence is a means for making your interpersonal relationship with a person better and for building a horizontal relationship. If you do not have the desire to make your relationship with that person better, then go ahead and sever it. Because carrying out the severing is your task.
And here the amoral system will break down every time because constant separation will make all relationships shallow. Sticking with faulty people is difficult with a moral system, but i suspect impossible without.