They daren’t confide in each other, not knowing whom to trust; they are scared to speak out, in case their suspicions are true and their families are targeted.
Or had Harry been nothing more than a tool to be polished and honed, but not trusted, never confided in?
Can you confide in me what the mission is?
Mr. Weasley had explained that after the death of Dumbledore, their Secret-Keeper, each of the people to whom Dum-bledore had confided Grimmauld Place’s location had become a Secret-Keeper in turn.
Yet you confide much more in a boy who is incapable of Occlumency, whose magic is mediocre, and who has a direct connection into the Dark Lord’s mind!
Tom Riddle, who confided in no one and operated alone, might have been arrogant enough to assume that he, and only he, had penetrated the deepest mysteries of Hogwarts Castle.
He wondered who would do it… Ron and Hermione would know what needed to be done, of course… That would have been why Dumbledore wanted him to confide in two others… so that if he fulfilled his true destiny a little early, they could carry on… Like rain on a cold window, these thoughts pattered against the hard surface of the incontrovertible truth, which was that he must die.