the very word
relationship comes from the word
relate,
to feel
related to another
to feel it deeply in your heart, in your mind, in your blood
that is the very essence of
relationship
to lie to another human being would mean that you don't really care for that person, and that there never was any kind of real relationship to begin with;
we are all connected, and a liar is someone who doesn't care about the consequences to humanity for their lies;
I don't bother about such people, whether they lie to me or to someone else, they have their own life, such as it is