As believers it should not be in our nature to bear grudges for one another. Offenses are bound to come whether we like it or not. There is no perfect being in this world. Even the person we hold closest to ourselves can offend us.
But what does the bible say regarding this? It says that we should forgive. Our daily yearning should be to have a heart like Jesus. The kind of Jesus heart among other features is one that possesses the attribute of forgiveness.
Jesus is so forgiving in nature that he forgave us of all our trespasses despite their weight and has even forgiven us of the ones that are yet to come. If we want to be able to love just as Jesus loves and instructed us to do to others then we must be able to forgive people and not take their offenses to heart.
Unforgiveness over time can lead to hatred and hate should not be found in us.