Even as Christ forgave you, so also do ye.
One of the characteristics of our Lord Jesus was that He bore no grudges and was willing to forgive - completely. Maybe one of the major causes of a bitter attitude and unhappiness in a Christian’s life is that there is an unforgiving spirit. This must be dealt with. Ask the Lord to help you forgive those who have wronged you (even though they may never apologize). You will not be at peace until you do.