The truth is you need to be forgiven more by God, than your neighbor needs to be forgiven by you. You have committed more sins against God, than you neighbor has committed against you.
You see, your nature and my nature is sinful. We have done wrongs to prove our sinfulness. Even if we are good to a large extent, just a little sin in our souls, makes us fully unsafe. Like an ounce of poison in a bottle of potable water pollutes the whole drink, an ounce of sinfulness pollutes all my good deeds.
I need the forgiveness of God. You do as well.
Have you attempted to receive God's forgiveness and failed to do so? At least you are not sure that God has forgiven you. I have good news for you. It is possible to receive God's forgiveness and know it. How?