But one boy said that another boy leaked the girl's privacy, but another boy refused to admit it, and the girl would think that this boy was lying.

If a girl thinks a boy is lying, at least it means that she doesn't care about him at all, or even hates him. On the other hand (don't think he is lying), it means that this girl at least regards him as a friend (it's hard to judge whether she likes him or not ~), because only a true friend will care whether your privacy is leaked by others.

But on the other hand, this boy, he said that another boy leaked the girl's privacy, which is a very "serious" thing! Therefore, when he tells the girls about this, he must provide the corresponding "evidence" at the same time, otherwise he will be suspected of creating trouble and sowing discord! ~ and if he can really produce evidence, is it necessary to worry about whether girls think he is lying? ~~