If you want to know how to survive a nasty breakup or any other challenging moment in life. Just stop and ask yourself two questions.
The first is, how much of this difficulty could you have prevented had you been a bit wiser 10 years ago? And when you realise how much of your current problem can be attributed to your past-self's lack of foresight, the next question is this:
When approaching this problem, you're going through at the moment; what's going to be in the best interests of yourself, 10 and even 20 years from now? When you consider if from the perspective of your future-self, it might change your perspective on how to survive a nasty breakup, or similar challenge that you're going through right now.
