We all have a past, and what happens in our past wether by our own hand or at the hand of others is the make up of who we are today.
Dealing with the past, you have to look at it and say well can I change it,? in most cases no you cant, would it make any difference to the people you hurt or that hurt you if you went back to revisit it........ nope. The only thing you can do is learn from it, mistakes are natures way of us learning. You cant punish yourself or others for ever for what has happened in the past. It is past now you look to the future, put it behind you and if you need a short course of therapy to do so then so be it, no shame in that.