Forgiveness is a powerful tool. If you allow anger and other negative feelings to crowd out positive feelings, you might find yourself swallowed up by your own bitterness or sense of injustice. But if you can forgive her, you might both learn from the situation and strengthen your relationship.
Forgiveness can help us to feel better. But when we anger, that will not be easy as our emotions become higher and many of us hard to control the emotion. Maybe we need to calm down and think more to see what is behind that thing that we got so we can analyze what is wrong and right. After that, if other people do something wrong to us, we can forgive them and try to forget because we do not want that thing to be beside us for some time.