Situations in which forgiveness is difficult often raise questions in our minds, especially when the cost of obedience seems high. This still happens to me all the time. That certainly hit a tender nerve because of what had happened with Karen. Andy and I promised each other that we would always forgive. Often, just being able to put my finger on the reason for a feeling helps to lessen its control over me.
Love is much more than an emotion.
I would suspect that in his agony on the cross, Jesus did not feel like forgiving. Obedience is an act of the will. When I obey the command to forgive, to relate to that person as if the offense had not occurred, often the feelings follow. Praying for a person who has hurt me has also been vital in the restoration process. The biblical character Job is one example of this.