Fruits of Forgiveness

I realize my relationship with people often is blocked down by a wall called bitterness. It is hard for me to forgive someone who done wrong to me and without apologizing to me. I can speak of many unjust things being done to me in the past by many people that I have a million reason to not to forgive. Jesus says, if you don't forgive, I can't forgive you. You will be forever tormented if you don't forgive. Who is the greatest offender anyways? It's me, who had sin so much against Christ, I own him a billion dollar, but He freely forgives me. How can I forget such blessing and holding a grudge against my brother? My brother only own me 10 bucks? I need to proclaim this reality and seek to see people's intention instead of their actions.