my ex girlfriend / girlfriend says she doesn't know what she wants but she wants us ? to see each other no pressure and see what happens but feels she must first experience dating ? before we move on hopefully?
Women think and function very differently in relationships than men. Although she was hurt by your actions, and she left you for a time, it is very clear that she still has feelings for you. If she did not, she would not have agreed to see you again.
She has been emotionally injured by what happened between you. As a result she is going to be very cautious and will not be agreeable to simply starting the relationship back where it was. Instead, she has elected to wait and see what happens with you and how you act toward her and with your addiction.
If you maintain your sobriety and you stay focused on what you need to do to get better and you are willing to let her go at her own pace, slowly...I have good reason to believe that, professionally speaking, your relationship will not only survive, but grow.
Had she been so angry and hurt by you that there was no hope of repair; typically, most women will tell you directly and with their actions. Here she returned to you. That is an excellent sign and as long as past mistakes are not repeated this relationship has a very good chance. Steven