When you discuss the relationship, what does she say she feels about you, other than the sex? Does she say she is still in love with you? Still passionately committed to you above all others, etc?
I will first explain first - I am a menopausal woman who has been lucky enough (so far) to retain her libido, perhaps with the aid of HRT, so I can't fully empathise with how your wife feels (tho I have previously suffered low libido when on hormonal contraception, so do have some insights maybe).
But for me, libido is only one element of that passionate attraction to my partner. To just give two examples from today: my man has recently grown his hair long which I really like and when he came out of the petrol station today I didn't recognise him for a moment, thought who is that gorgeous bloke? And then I wanted to tell him about that when he got in the car. Because I love him and know he can be insecure about his looks and thought he should know how beautiful I still find him, even in our late 40s....Then later, we were cuddling in bed and I was thinking how nice it was to have his strong arms around me (sorry for sounding like a bad romance novel) even tho I have a cold currently and no interest in actual shagging, Tonight, as I do often, I definitely initiated and enjoyed lying naked together for the physical pleasure and emotional closeness (though not for sex itself).
NONE of this is connected to libido/sex. So these feelings of love, wanting him to feel special, finding him beautiful etc, they would still remain if my libido were gone, I believe. And consequently I believe some level of sexual intimacy would still be possible and desirable for me, even if my actual literal sex drive was totally gone......I might focus more on his pleasure than mine, for example. And more on things like massage/sensual touching with some sexual release at the end...... Just speculating. But I think there are ways to go about it that can make it a pleasant experience for both partners even if one of them doesn't feel much like having actual sex....... OF COURSE I only mean if both are fully on board and agreed to try - I hope that goes without saying......
IF your wife still feels that she loves you and wants you to feel special and loved, then I think there is hope and maybe you can work on it together.If, however, as it sounds from your later messages (about her never initiating cuddles etc) she more sees you as a friend/housemate now, then I think it is possible you may need to look to leave.
It's possible that all the arguments have been making her feel more entrenched in her no sex position. It's difficult, because my immediate response is that you shouldn't be trying to argue her into sex she doesn't want...... But equally she shouldn't expect you to live a sexless life you didn't sign up for ....
What I would absolutely urge you NOT to do, is show her this thread and say, look, other women make the effort even though they don't feel like it. Everyone is different, and you can't persuade her to love you/want you by telling her what other women do.
In the end her feelings for you are what they are, and you sadly won't be able to argue her out of them. If she doesn't love you any more - or not as a husband/partner/lover anyway - then I think you may have to get your head around moving on.