Choose to forgive all who have done you wrong. Ask God to forgive them even as he has forgiven you. Refusing to forgive does not hurt the person who hurt you. To not forgive is to block the healing from God for the broken places in your heart. If you forgive, you break the power of bitterness.
Get rid of all bitterness, rage, anger, harsh words, and slander, as well as all types of malicious behavior. Instead, be kind to each other, tenderhearted, forgiving one another, just as God through Christ has forgiven you (Ephesians 4:31-32, NLT).
Hard times in life can easily leave you bitter. No one is exempt from criticism, being judged by others, or being mistreated. When it happens, you have a choice. You may become bitter, if you choose not to forgive. If you forgive, bitterness and anger are dismissed.
If you allow yourself to become bitter, it will hurt no one but you. Watch out for self-pity. It is a constant companion with bitterness. Misery always follows close behind self-pity and bitterness.
If you forgive, then you overcome bitterness. Forgiveness will work for you. I know, they probably will never ask for your forgiveness. Yet, if you forgive, you are always the winner. It's a spiritual law that works in your favor every time. If you forgive, bitterness loses power over you.