"What is forgiveness? I am asking this question because I find it hard with myself and I have this anger inside of me.
it's really hard.....

Forgiveness is a process, not a quick-fix.

It is letting go of what you have exerienced, people who mistreated you, who took advantage of you. The anger is fruit that grows on a tree that has a problem at the roots.

Whatever has happend in the past, you have to first look at what Jesus did for you. Romans 3:23 says we have all sinned and come short of the Glory of God. While we were yet sinners, Christ died for us. We hurt him, by our sinful life, we come to Him and He forgives us. He did this by dying on the Cross for you, that was very painful, but He did it because he loves you, and in His eyes you are worth that.

Now we look at other people, and they hurt us, but we have to see that God thinks they are valuable, and Jesus died for them too. Now because we have accepted forgiveness from God, we have to learn to forgive others. The word is "For-Give". They may not deserve it, but you Give to them by you letting go of your feeling of hurt, and offering them forgiveness.

It does not matter if they accept your forgiveness, or not. What matters is that you let go of the hard feelings, the anger. The anger and hurt will kill you, it will bring sickness in your body and mind. Anger will eat away at you. Let it go, not because the other people deserve it, but because you cannot live with it.

Take time to be alone with Jesus, under a tree, or in your room alone. Tell him you want to give away your hurt and anger, and forgive those that sinned against you.

Ask Him to heal you. Then remember, it is a process. You may have to turn to Jesus many times, and ask for His help as anger rises up again. You can be healed from this, but it is by forgiving when the other person does not even change.

It is you that needs to change, with God's help.