If we wait till we FEEL like forgiving, nobody would do it. In your will recognize the hurt and your response of rage or resentment or whatever. Recognize the need for releasing that response into the hands of Jesus. The feelings are like a caboose on a train. They come somewhere way down the track.
Forgiveness needs prayer.
In prayer we acknowledge the hurt we feel, the desires for revenge lay them all on the table before his heavenly throne. In more prayer ask for the spiritual help to carry on. Ask for protection from demonic forces that will want to build dams against rivers of forgiveness flowing through our lives. It s hard to forgive without seeing ourselves first as forgiven people. Try to say the words.