CB, I think it is a huge mistake for you to obligate yourself to financially support her through nursing school, when she is telling you she wants a divorce!
You may think agreeing to support her will help win her back, but it won't. It doesn't matter that that was the plans (nursing school) in the past. That was before she wanted to D you. I promise you that she will use you, get every dime out of you, benefit herself and ensure her future financial security........without ever looking back or feeling indebted to you,..........and she'll still D you. The fact that she has the b@lls to expect you to support her schooling after she tells you she wants to D you.........tells me she is used to telling you how things will go, and you usually do as she says.
You cannot make decisions as though you were still living together.
IDK about her new female friend being an EA. Has she ever hinted at being sexually interested in females? If not, then I would not classify it as an A yet. OTOH, female friends can have tremendous influence on each other. Not to change their sexual preferences, but on other areas in their life. Many women have D their H, b/c they were influenced by another woman to believe a lie. That lie usually has something to do about the grass being greener as a single woman.
Unless there was some terrible unresolved issue at a very young age.......I would not jump on the MLC horse just yet. 30 is pretty young, and there are other things that could account for her sudden desire to get a D.
Can you tell us more about the marital history? Can you describe the dynamics in your relationship?
What are you doing to GAL?
Have you read the 37 rules, and are you applying them? Any questions about them?
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!