In life we collect memories and experiences along with the emotions those events carried. Some get retained, others discarded that perhaps come back to greet us at a later date. All of us are bound and tied up in the events of the past, for better or worse we are triggered by these memories. No matter how far some push these back or try to escape the past will always be there.
Hopefully your happy memories outweigh the bad, and that in time the darker parts of your past will fade entirely.
