Hi Pajo, sounds rough at the moment but I do have some similarities going on here. My W has often said that she is done with no further explanations and always questions why I won't give up and what do I need to have closure etc.
I don't answer these questions, rightly or wrongly, I feel that my W is going through depression but has not seeked help and it's not something I can push her to do.

She is due to leave on Monday but I will tell her that I never wanted her to leave. For me, if she is the one that says she is done then she is the one that needs to leave.