1. Have a mourning period.
Our brain associates a breakup with pain. In fact, the psychological suffering can be so excruciating, that in the case of married couples, just separating from a spouse causes more stress than losing a close member of the family. In a way, something does die: The bond and future of the relationship you had together.
This is why it’s a good idea to go through a mourning period and eventually just accept that everything has come to an end.