If a partner leaves it is better to make him/her right. It will be as if you lift him/her up a hill which (s)he will be easy to roll down from back to you. If you make him/her guilty you will find yourself up the hill, and when (s)he wants to come back to you (s)he will be faced with the choice whether to climb up the hill to you breaking his/her nails or settle down there in the valley.