Much has been written about attachment styles, starting with ways that infants bond with their caregivers and then extrapolated to how people respond in their romantic relationships.
Here is a summary I made of the four primary attachment styles (information from Psychology Today):
Of course, the way we respond at the end of a relationship also depends upon our personal makeup and early experiences. I created a chart of detachment styles based upon the same criteria.
Breaking up happens. How do you want to detach?