For some of us who are children of divorced parents, and suffered because of it, and now find ourselves in a similar situation, the motivation for not filing runs really deep. I can totally relate. Like you, I have had a lot of people tell me to "move on" and "stop letting WH take advantage." If that was as easy as it sounds, then sure, I would have filed. But (like all of us) I am a complicated person and so is my WH, and every situation, of course, is unique. In my case, making the decision to file and thus letting my WH off the hook, so to speak, would have been a really bad decision, for many reasons. Just telling you to remind you that, in the end, only *we* know what "boundaries" are most important for ourselves.
Of course nobody has to tell you that - you already know! I *love* (as posted above) that you can look back at your behavior and feel proud! You should - I'm proud of you just from reading along!!