Betrayal is one of the things that is very difficult to forgive. Especially if it is committed by family people. As the saying goes, a betrayer once will betray twice. It is not worth taking revenge on such people, they punish themselves, but trust too.
Do not trust the person who already betrayed you once. If he did this, then he wanted it, so it was convenient for him. Sometimes it happens that after some time, life confronts you with traitors. Here one lesson should be learned, to understand that people do not change. It is not worth evil to communicate with such a person and even more to take revenge. Just keep it at a distance. Do not believe in his repentance and the renewal of the friendly relations that he offers.
The hardest thing is when traitors are close people. Those from whom you do not expect a dirty trick. There is a feeling of deceit and emptiness. Man is a weak creature, and under the influence of feelings and instincts in certain life situations begins to save himself. Self-sacrifice is inherent in few.
The tendency to betrayal, like other vices, “sucks”, do it once, and repeat later many times, during the first life upheaval. Such people are inherently weak. They are afraid of responsibility, difficulties, they wish to avoid them. When the crisis passes, they return and begin to "repent."
However, even such people deserve to be forgiven. Since everyone makes mistakes, but the question of trust is clear here.