I agree with DG. You are definitely in LRT territory. You have at least two of the qualifying criteria for using the LRT - the physical separation and her stating she wants to D on no uncertain terms. It sounds like you already have some pieces of the LRT in play right now by default.
Start working hard on yourself. This is for your mental health as well as an attempt to save your M.
Your W is in an irrational state of mind. She needs to go on her journey right now while you work on yourself. Be the person only a fool would leave.
A lot can change in a few weeks. Keep your head up.
