Thanks you all for your kind thoughts and words. Stacy and I have been separated for 2 years and long ago agreed we weren't getting back together. Still, her filing hurts more than I thought it would. I think that it's the final (or almost final) indication that this part of my life failed. Also there is the fear of being without health insurance. I can always get relatively inexpensive high-deductible insurance and I'll get a job sooner or later and insurance should come with that.
Good luck acidbasement. I'm sure it would be good for you to finish the degree. I'll keep my fingers crossed for you.