I question the whole notion of a ‘broken relationship’. Some people are meant to be in your lives, some not. If a relationship has ‘broken’ I see it more that it has ‘expired’ and it’s best that everyone involved not try to muck about with things and try to force the world to their designs – it never goes well.
I think it’s much more apt to think on these broken relationships and ask why did they break? Was it because your interests have changed? Was it something in your stars? Whatever it is, accepting what happens is the first step in not being trapped in the past.
There is a part of me that considers the past to be dumb. Not in the “stupid” sense, but rather in the “dull” sense. There is nothing the past can do other than provide a lesson, once you’ve learned the lesson it’s good enough to simply let the past drop away. You can’t change any of it, you can’t go back and do it any differently so fretting over it is just an exercise in wasting time and energy.
So I say let sleeping dogs lie, let the broken relationships fade away. Learn your lessons, move on with your life. Don’t dwell, it’s not good for you.