Colossians 3:13 says, “As Christ forgave you, so you also must do.”
Begin the process of freedom. How? Well, keep no list of wrongs. Pray for your antagonists rather than plot against them. Hate the wrong without hating the wrongdoers. Turn your attention away from what they did to you to what Christ did for you. Outrageous as it may seem, Jesus died for them, too. If He thinks they are worth forgiving, they are.
Does that make forgiveness easy? No. Quick? Seldom. Painless? Forgiveness vacillates. It has fits and starts, good days and bad. Anger intermingled with love. Irregular mercy. We make progress only to make a wrong turn. Step forward and fall back. But it’s okay. As long as you’re trying to forgive, you are forgiving. It is when you no longer try that bitterness sets in. Keep trying. Keep forgiving.