I feel your pain. On the rare occations my x spoke to me it was to tell me how he was really still in love with my old roommate, who he took out maybe 4 times, might have gotten one kiss from and certainly never slept with! (And while he is telling me his wacked in the head story I am struggling not to burst out laughing.) Or he tells me how the first woman he wanted to leave me for was really the "ONE" and he has felt like he should have gone ahead and divorced me then. And how now if he does't go for current OW he will always feel he missed his chance.
And inside my head I'm thinking, can he hear himself talking? Clearly NOT! You can only listen to so much. BUT, if you can rise above it and even validate his feelings once, you will feel so much better. I am not sure what words you should use. But each time I have managed to validate what seems like not valid topics with my now X he has dropped those topics and moved on to other topics.
And sometimes the other topics shed some light on what the heck they are thinking. And when he talks to you, you are answering him. I think you should just listen, and not try to reason with him. He can't hear you right now. When you talk to him it just gives him something to argue against, to prove you wrong.
My x doesn't ever remember stuff he said to me. I have been really hurt by some mean things he has said. I confronted him and he swears up and down he doesn't remember saying certain things. And dang they are seared in my brain.
Hope your day gets better!
Me 57 XH 58 Sons age 32 & 27 M:32 D final 9/12 Bought 10 Acres and Living the Dream!