I’m 60 and on my own and I have a great life. Sure, I miss having some to share it with, but reading your posts makes me think I’ve made a lucky escape by not ever having to deal with the gut-wrenching stuff you’re going through.
I really feel for you.
Particularly in the way your husband is being hugely emotionally manipulative by making HIS behaviour your responsibility.
His.Feelings.Are.Not.Your.Responsibility
He’s a grown up. He’s behaved unspeakably badly and he’s trying to make you take the blame and the burden of fixing it.
And it’s not tit for tat - that you had an affair 25yesrs who has nothing to do with his actions now. You divorced then. If you got back together, presumably that was a choice you both made.
Or ask him, was he saving this up as revenge for 25 years ago? Did he choose to get back together with you so that a quarter of a century later, he could pay you back with an affair?
It’s just laughable that a grown adult is so gormless about his actions, his choices, his feelings.
I hope you find the strength and determination (cold fury maybe instead of guilt?) to throw him out and take him to the cleaners, emotionally as well as in the more practical things in your joint life.
Look, I know how hard it is to separate two lives so entwined. Been there, got the T-shirt. It’s hell going through it.
But being single at 60 is NOT something to be scared of or disdainful of. You’ll be so much better off without this rather pathetic man child.