You are the only perosn who is most hurt by unforgiviness. When we remember that we have benefited from God's forgiveness, it becomes easy to forgive others, this pave way for harmonious relationships even with our worse enemies. Father, forgive them, for they do not know what they are doing (LUKE 23:34). We are strongly recommend to forgive others when they sin against us and we shall be forgiven, for Christ has forgiven us.