solidgold- you said this:Having to spend a lot of time in the company of someone who wants you sexually when you do not want to be sexual with that person is actually very, very corrosive. The other person will, in the end, come to disgust you (however nice, decent and non-pushy s/he is). S/he will also gradually begin to resent you and feel hurt and angry at your lack of desire and the situation will just get more and more unpleasant.
Do you have evidence/experience of this? sometimes i thhink your posts are very good and hit the nail on the head, but at other times i think you make comments which you convey as facts, but are actually your opinion.
Some men and women are happy to stay in an unsatisfactory relationship- possibly without sex- rather than ending it. They might choose to stay for financial reasons or for the sake of the children.
Very few relationships tic k all the boxes and although good sex is fundemental to many people, other people might be not feel quite the same, or it may be a price they are willing to pay.
I can empathise 100 % with the OP_ I felt the same as she did after my 2nd child- completely trapped but unable to make the break. I have felt that way now for over 20 yrs. recently I met a man- who is not free, but we are friends- who makes me feel sexual in a way that no-one else has, but we are holding back due to our consciences.
This has made me see how little my DH does for me, but at his request I am giving it one last try and trying hard to see his good points and try to re kindle desire, as I do not want to divorce or put my children through a divorce.
Going back to your original point, my DH has only just said he wants to end things if they don't get better- this is after 9 years of no sex- partly due to a genuine health problem but also down to my lack of desire for him. I am sure many of you will be shocked by this...the point is that he loved me enough to put up with it....
I think the OP knows what she has to do, she just needs the courage to do it.