Leave your partner with their dignity; there is no need to humiliate them or yourself! You will be remembered fondly if you do not criticise every little thing they did. Highlight their good points, saying that you appreciate all the nice things about them. Be discreet about breaking up. Choose a neutral place to tell your partner. Why tell them at the end of a date or when it's late in the evening, leaving them to agonise over your decision through a sleepless night? Have the courtesy to tell them during the day, when they can turn to friends or family for comfort....