I've read your prev thread. I'm just going to come out and say this.
I think your self-flagellation is out of proportion to your crime. To the point of pathology, frankly. You had an affair, you revealed part of it to your H to ensure you can hang on to the guilt of being dishonest, and then you commenced with the beating-self-with-birch-twigs-till-death part.
I'm sorry to say it, but that is actually quite ridiculous. It's not a sensible way to deal with the problem. You are using these emotions to distract yourself from something, I would bet money on that.
I think you are quite drunk on it actually -- the self-loathing. It's now part of your connection to the OM, part of the set of powerful emotions that you've used to bond with him. They are part of your intimacy with him. I'm quite sure that there's a large part of you that would not give up the loathing, for fear that your life would become boring and grey without the intense emotion, and the connection it consolidates with the OM.
You talk about this man like he's your grand passion, like the affair is something that great novelists would long to immortalize in florid prose.
Actually, mature love is not like that. It's not a compulsion or something that ruins you. Infatuation, & relationships that feed unresolved subconscious issues, DO feel like that though. They're addictive, heady, painful, all-consuming, they distract you from EVERYTHING you should hold dear. But they're not real. All that emotion is bubbling up from something inside YOU, completely independent from him and his qualities.
It sounds to me like you have deep-seated self-loathing, combined with an odd sort of pride that you are "different" from ordinary people, that originated long before the OM was on the scene. When he appeared, you probably clung to him because he mirrored these things back to you, helped you ignore the things that you REALLY need to face, and that was intoxicating.
You need to put the shame aside and start examining yourself with compassion, honesty and curiosity. There's a monster under the bed, somewhere in your life. Once you find it and face it, you'll be shocked to find this OM suddenly looks quite small, human, frail and a bit pathetic.
If you really wanted to resolve this situation, you would have cut him off immediately and spent all your energy in psychotherapy. I'm not saying that to shame you shame is useless, what you need to understand is your motive, and to work from there I'm just pointing out that your actions don't line up to your words. You are hiding something from yourself.
If you've been in therapy, and it hasn't helped, look for someone else. A healthy person grieves a major loss for a period of 6-18 months; if the negative emotions are still preoccupying you two years on, you need professional assistance. You have taken this too too far. There is something in this situation that you are stoically ignoring, and that's why it's dragging on. The shame and guilt are, imo, fabrications that you're using to ignore the real issue.
I'm just some random internet person, but that's my take on it. Sorry for the long disjointed rambling. Hope this post is helpful despite that.