Great advice from Sandi and Starsky, as usual. I can't get over how similar my situation is to yours. Getting caught up again on your sitch, I've come down off the hopeless train here.
Looks to me like your doing great things, but I agree with Sandi, from the outside, it looks like you trying to get some type of commitment to work on the marriage. I know that's what we are all seeking, but I'm starting to realize we will never get that.
Seems to me like myself, I need to get away from ultimatum type threats . A lot of the introspective thoughts you are putting down, are awesome, but I don't think your W will see them the same way. I'm hardly an expert, but because I know what I am looking to get as a response, I get why you are thinking this is a good idea.