For if ye forgive men their trespasses, your heavenly Father will also forgive you: But if ye forgive not men their trespasses, neither will your Father forgive your trespasses.
Forgiveness is a choice!!!
Bitterness is a trick of the enemy to keep disunity, strife, and discord between families, friends, coworkers, and even Christians. I encourage you to drop it, let it go, give it to Christ, and let God deal with those that have brought you hurt, pain, and suffering.
I guarantee this: once you release the people that have hurt you, your healing and restoration will most certainly come, and your blessings will be looking for you.