There is a far more important reason to forgive than just a desire to be happy. Jesus says how you treat others is how God will treat you. If you claim your right to punish someone who hurt you, then God will claim His right to punish you. But when you show mercy, God will shower His mercy on you.
Something happened to me last week that I never experienced before. I couldn't even find the words to describe the experience until I accidentally found an article on the internet that explained what happened to me.
How will Jesus remember you in your judgment? Have you lived your life in a way that Jesus will remember you as faithful to Him? Will He remember you as living Micah 6:8, "This is what the Lord requires of you. Be fair to other people. Love kindness and loyalty, and humbly obey your God."
Jesus not only walked on the water to save his disciples, but he walked on the dirty road to Golgotha to save us all. I believe Jesus fell three times because He was running to Golgotha to accomplish His Father's will and bring us home.