Ah yes, the past can hurt. But the way I see it, you can either run from it or learn from it.
Bad experiences were never designed to make you not feel a little bit of pain when you think about them. We are given the choice to either run from the past we once lived through, or we can learn from the past we once lived through. When we choose to run from our past, we are making a conscious choice to try and avoid problems that we will have to keep facing over and over again, choices that we have no option but to face one day, and choices that we will never get past until we choose to stop running.