The past is a tricky thing.
If it was a place of positive experiences, then we tend to linger and compare every future experience to this place.
If it was a place of of negative experiences, then we tend to linger and compare every future experience to this place.
See the pattern?
Whether it was a positive or negative place, the past is the past and should remain there.
Because you are alive and LIVING right now! Your book is still being written and if you keep flipping back to a previous chapter, then how do you expect to move forward and grow?
Leave the past where it is. It might be a place of beauty or it might be a place of disgust but the you that lived there is not the person you are today. You have the power to change as long as you keep moving forward.