Mourning the End of the Breastfeeding Relationship
They are a part of your grieving process and come from experiencing a significant loss and being forced to make the major life transition of being without this person.
The 5 Stages of Grief After a Breakup: Why the End of Your Relationship Is So Hard
There may be a chance that you can be friends in the future, but if your partner leaves you, then you have the power to decide if and when he or she fits into your life again.