Since it is God's command to forgive, there must be a way to forgive when it is difficult.

I like to share what I have heard more than 15 years ago from Rev Seaward, invited guest preacher during Aldersgate Service. He peached well, otherwise I won't be able to remember after so many years.

1. Recognise that you had been hurt and that you need to forgive. Don't brush is aside or pretend you are fine with it.
2. Since it is God's command, forgiving is an act of will and not an emotional state. So the first thing to do is to decide to forgive.
3. Pray to God that you had decided to forgive the person. Admit to Him that it is difficult and that you need His grace to forgive the person. Ask God to change your feeling towards the person. Forgiving the person has taken place, even without any emotional change.
4. Allow God to work at His timing to change your emotion. At the same time, work on it.
5. Thank God for His grace.

On Sunday, I heard my friend Cynthia preached and she said, "Motion leads to Emotion". How true. Act towards the person as you would have forgiven and you would later feel that you have forgiven the person. There is no longer any bitterness.

Let me know what do you think or if this is helpful. :-)