I am just shaking my head here bud. You had an excellent post from walking...that is definitely one to print and put in your back pocket. The text wasn't bad....but I wouldn't have done it. That said I really want you to go back and look at your threads over the last 48 hours...then do it again. Be honest and tell us what you see.
On the co-dependency issue...without a doubt that is a problem in your old relationship and even continues to this day in your relationship with your wife. Step back and analyze your behavior. As strong as you are trying to appear at times....the tell tale signs are still there. It is almost like you are at a crossroads and can't make a choice which path to take. You keep stepping down one path and then pull back. Read your stuff....there are a lot of answers there waiting for you.
Jack is right about venting to the kids. You want to be open and let them vent to you by validating their feelings, but venting back to them is unhealthy for them, you, and eventually your wife. You are their rock and be there for them, but they are your kids and need to see you stand tall and strong. As much as you strive to teach your kids to be open with their feelings (and I do applaud that), this is one situation were leading by example might not be the best course of action.