To forgive is divine. You have to forgive your neighbors, even if they sin against you.
For without forgiving your neighbor of the sin they committed against you, the almighty God our creator won't forgive us of our sins. You can imagine when your creator don't forgive you of your sins and his not by your side, that's very dangerous.
So you have to forgive those who sin against you,for God to forgive you of your sins.