Ots,
stay strong, confident, decisive and calm.... You need to be in control of what you want. Positive steps are great, but you need to see hard, consistent ACTIONS that shows she wants your marriage to work. If she starts to waffle, don't let her see how this affects you. Walk-aways will test you to see if they still have control over you. If she were to decide she wants your marriage to work on again, you can't just let her walk back into your life. She f'd up, if you are so easy to forgive, it shows you have little personal value, and she can do whoever and whatever she wants and you will take her back.