One person is dissatisfied with the relationship and will weigh up the pros and cons, and evaluate these against alternatives. The reasons for their unhappiness will focus on the partners shortcomings and they will make plans for the future.
Grave dressing stage (moving on)
Now that i think off it he...
The dissatisfaction will be shared between the partners. Dissatisfactions are more noticeable due to confrontations. There will be two outcomes: Continue to break up or try repair the relationship
The break-up is now public and partners will seek support from outside of the relationship. Friends will react differently. Some will provide reassurance, some will be judgemental and some will provide new information.
You're better off without him
I heard that she...
When the relationship is over the partners will need to come to terms with it. They will create a story that helps maintain their reputation and will 're-write history' to try lessen the feelings of the loss.