Hi Dinsdale. Well you have several questions in need of answer. If you step away from the effort required to split up the household; engage a lawyer; hash out arrangements; figure out where friends fit in afterward, there are still really important personal issues to face.
If you believe you can live your life never again having the joy of an intimate/passionate partnership with some one, then you could stay on playing the role.
If your wife could also answer yes to the above, then it might work out.
Admiring her, finding her intelligence attractive, etc., are all great things that can remain with you throughout your lives. You are forever bonded in some manner through children and their progeny anyhow.
If you can be content to be a little bit lonely - or heck - a lot lonely in a life lived simply as room mates, then that’s fine too.
But you know, as others have said, life really is short. If family was extremely important to you in the past (and I don’t mean to imply that it isn’t now) you are demonstrating a personal value in close, intimate, relationships.
I tried it the way you suggested for many years - and I only got older and more lonely in the process. I never wished ill on him BUT I did recognize that while we lived the sham I was preventing him from being loved in a way that I couldn’t love him.
I suggest that you and your wife deserve to be loved to the greatest extent possible, and to do that, you need to be single and resolved in your joint lives.
FWIW, I stayed waaaay too long because I was afraid of what it might do to my children, my finances, and yes, whether I’d ever be loved again. As a counsellor pointed out to me, fear is a tool to help keep us safe and provides discomfort so that’s we’ll act upon that message of fear. If fear is immobilizing you and keeping you in a static situation then fear as a tool isn’t serving you at all - and it’s time to let it go.
I don’t mean to sway your decision in any way, Dinsdale, I simply wish everyone a rich and fulfilling life filled with all the possibilities for love and happiness.
You’re in my thoughts during your difficult decision-making. BTW - vascillating is a perfectly appropriate stage to go through . . . just don’t stay in the stage too long, it will exhaust you as you weigh and re-weigh possible options and outcomes.