“Uncoupling is primarily a tale of two transitions: one that begins before the other. Most often, one person wants out while the other person wants the relationship to continue. Although both partners must go through all the same stages of the transition in order to uncouple, the transition begins and ends at different times for each. By the time the still-loving partner realizes the relationship is in serious trouble, the other person is already gone in a number of ways. The rejected partner then embarks on a transition that the other person began long before.”