Playing the victim is one tough habit to let go of that most recovering addicts will be able to relate to. It is just all too easy for you to put the blame on other people for what happened to you instead of accepting the responsibility for the actions that you made. At the end of the day, you have to accept that the choices made in the past are all of your doing.
It is impossible to learn from your past mistakes if you will not be accountable for them. However, it does not mean that you have to feel ashamed or beat yourself up for what you did. Everyone makes mistakes but you can take a major step forward if you will accept responsibility for the bad choices that you made.