It pains a lot when long term relationships are over. For most it is similar to a tumbler made up of glass that once breaks is difficult to realize in its original form.
Celebrities, all through their lives, live in pomp and show. They are at times so alienated from their own self as well as their kith and kin that they find themselves alone at crucial stages of life.
Success is a formula that everyone wants to have but only a few can retain. The same can be said for any successful filmmaker-actor pair. Directors and actors often like to repeat a successful experiment.