You are an amazing woman! Do not think for one second that you were the cause of your divorce. A real man would appreciate the love and focus that you were providing to his children.
My bet is that you were a very loving and attentive wife, you are just searching for reasons as to why your marriage ended. Do not do it! It is unfortunate that some of us who were truly committed to our families just happened to marry people that did not share our core values. It is very common today.
One person finds joy in raising a family and watching his children flourish, the other is completely self absorbed. You will never understand or relate to the Walk Away Spouse, so do not waste your time. But... we all do it.
Personally, I believe you should have recovered after 5 years. My recommendation is for you to get a new counselor who can help you move on with your life. You are hoping to change the past which is impossible. It is time for you to look to the future.
Get a new counselor and start doing some things for yourself. You get an "A" for being a mom, I am sure that you can figure out how to get an "A" as a single woman who is committed to starting a new life. Do it for your kids! Make them proud of you!