text: the one has made a big mistake. forgive or forget? i have found the one and after 8 years we have a chance of being together. he made a massive mistake and now we are trying to reconcile, move on. should i give him one last chance or move on? no one else ever felt right. help!!! it depends on the mistake, you be the judge, if he forgot your birthday you can forgive him, but if he cheated say goodbye, once a cheater always a cheater!