I am so sorry that your SO is not as supportive as you need. My daughter is part of the celiac crowd too, just not as sensitive as you, but has to avoid dairy as well.
We haven't done this ourselves, because my DD gets incredible support from her family, but have you considered joining a celiac support group?? There is one operating out of our favorite health food store - check there first. You might be able to get in on some truly gluten-free shared dinners that way.
And yeah, we do make almost all her food here at home, so I get it. And it is tiring. Hugs!
I have a mantra that I have spouted for years... "If I eat right, I feel right. If I feel right, I exercise right. If I exercise right, I think right. If I think right, I eat right..." Phil-SC