@Ennirem I'm sorry, but honestly I couldn't with any conscience recommend anyone stay in a relationship with someone you suspect of having OCPD or try to fix it or manage it or try to understand them so you can live with them. At their very heart, OCPD individuals will not recognise they have any disorder because they are so convinced they are right/normal, superior, whatever.
I know I posted a story where my husband worked very hard to change, but he is rare, exceptionally so. And that's only because in his own weird way he loves me very much and wanted to fix things, but more than anything he finally recognised his childhood was very damaged and that his dad was abusive - and he was determined not to end up like that.
The upshot is - he's a different man; truly he is. He's lovely, kind, thoughtful, funny. He's a success story if you like, BUT, was it worth it for me? Say he has a shit day at work and he's a bit grumpy because of it. He's perfectly entitled to be grumpy, as is anyone, and it's never aimed at me anymore, ever, but I'm instantly tense and anxious. It's like a light switch in me. I can't relax until he has relaxed. I'm always watching him - reading his expression, looking for signs of irritation. My moods are governed by his moods to this day.
I wasted many many hours, days, years researching, trying to understand him, working with him to change. All to the detriment of my own peace of mind, mental health and personality and character. I don't really know who I am anymore, so dictated as I have been for so many years by someone else's needs, problems and moods.
I posted on mumsnet a few years ago listing the things he was doing, and without exception everyone said the same things that are being said now on this thread. I'm a frequent name changer as I was terrified he'd recognise me. I posted so many times under different names, and always got the same answers - leave him.