So often people say they love each other but as soon as one gets angry out comes the list of past sins! This is not love. True godly love forgives and refuses to keep track of personal slights received. Obviously we should not allow people to continue to hurt or abuse us or others. Thats not what 1 Corinthians 13:6 is teaching. The goal is to have a spirit of reconciliation to forgive those who seek forgiveness letting the past stay in the past.
I am peaceful now knowing I am happy seeing the person I love happy with someone else. People can call me weak but I know how strong I am accepting the fact that I am loving someone who does not love me back. Not many can reach that level of freedom.