The issue of you being there fof her emotionally? I think you are doing it as much out of you own EN as hers. As the LBH, you have that need to connect with her. As I told you before, she has two men meeting her needs.
In your logical VP, it seems she would realize how important a part you play in her life. However, she won't really "see" it until it is no longer available.
Here's what doesn't make sense. A couple can seperate and she still acts as if he is her part time husband for whenever she "needs" him.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!