To save me looking back, have you had some legal advice already? I think your priority needs to be the best one from a legal and emotional perspective. A legal separation doesn't sound unreasonable to me. But what are the legal implications and what does your L say?
From your post below, it sounds as though you are flailing around emotionally (not a criticism, I'm doing some of that myself) but it's time to put the financial, legal and practical hat on, and move forwards in a self-protective way that stays true to your emotional needs too.
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus