What did Jesus tell us about forgiveness?
"Then, Peter came to him and asked, 'Sir, how often should I forgive a brother who sins against me? Seven times?
'No!' Jesus replied, 'seventy times seven!'"
Like with any sin, we must first confess. God will never force himself on you. You must expose the hurt for Him to take it away.
Landmines in the Path of the Believer by Charles Stanley
Sometimes, forgiveness doesn't come immediately. I remember one time with a "friend" that took advantage of us in a business venture causing us embarrassment, frustration, and a lot of money. I prayed and prayed for God to heal the pain, but every time I saw the man, anger reared its ugly head again and sent me back to my knees. After two years, I entered a party not expecting him to be there, but he was. I smiled and went into his open arms, all unforgivenss gone, never to return. Praise God.
One extra note: Forgiveness isn't easy and only comes through God.