Okay, I so read your original posts and this post to kind of understand what has been going on. A few things can be true here simultaneously, it is not so black and white, mostly gray!
First, your BH is hurting tremendously and you have completely up-ended his entire life in the swoop of an instant. While you were having your affair over the last 3 years, he noticed changes in you, but he could likely never attribute them to an affair until well...he was able to do so and so he has 3 years worth of interactions to rethink. I'm a Madhatter, which is our SI way of talking about how I both was a WH and a BH, but let me give you an example of something that really stuck with me for a long time. My wife and her AP had a getaway weekend that she sold me as a "girls trip" and when she returned, she couldn't hide the fact that she had a new tattoo on her right wrist. I remembered thinking that it was kind of odd that these girls, whom I wasn't as familiar with (red flag bells should've gone off in my head, but they didn't), got a tattoo that included a heart. I mean, sure, women can love each other and get hearts to signify that love, but in retrospect, makes no sense. Fast forward to her confessing that weekend away and that they both got the same tattoo in the same place as a sign of their "love"...yeah...that one took a lot of time for me to process and get over. Now, I don't tell that story to do anything other than to try and give you a perspective of just a little bit of what your BH has been thinking of, because again, I've been in your shoes and I've been in your BH's shoes.
Your BH is just searching for a place to safely put his feet on the ground. That place was your shared home, but on account of your actions, at least for now and perhaps permanently, it will not be that home. I mean, the one person who was supposed to be his protector and have his back no matter what has let him down in the worst way possible. This isn't something that can be gotten over in a few days or weeks like a bad fight. No, this cuts so much deeper than you could ever imagine. His whole sense of self is completely up in the air right now and he does truly ride the emotional roller coaster. I do not know your BH, but I know actions, if he didn't still care about you and perhaps, love you, he wouldn't still be in your life. I don't say that to give you hope or promise of R, but just to point out that he may be an emotional wreck, as-is expected in his situation, but he still knows that you have been a part of his life for a long time and he doesn't just quit you. A very important thing for you will be to respond to his anger outbursts by acknowledging his feelings are valid and by owning up to your role in that situation. In response to him after an angry comment, "You are right to feel angry with me. I made a terrible choice to cheat, a choice that I deeply regret and one that I'm going to work on in therapy so that I understand why I chose that path and how I can establish boundaries to make different choices in the future."
The important part here is the follow-through, you are going to have to go into therapy with the goal of understanding why you are conflict-avoidant, why you require external validation, and what your relationships are with male attention and sexual attraction so that you can understand why your boundaries were not strong enough. For example, and this is not projecting onto you, but sharing with the hopes that it can enlighten you on your journey to your whys, a close friend of mine from high school, she was one of the first girls in our school to begin her development and by the time we were 14, she had the bust and curvy body of an adult woman. A 14-year-old girl with the figure of an older woman...attracted a lot of attention from fellow 14-year-olds like myself, but also a bunch of older guys, some as as old as their mid-20s. Well, let's just say that my friend developed a very fucked up relationship with the male gaze and her sexuality because it was getting all the wrong attention from the wrong places. She was seeing these older men and the only thing of value she was bringing to the relationships with men was her sex and so her unhealthy relationships with men continued until she was a 19 year old mother to a much older man's child. To say that fucked her up is the understatement of the century and I'm so proud of her for working through it today, but it took her 20 years to sort through. If we do enough shadow work and think through our youth, there are things we all internalized growing up that lead to us being susceptible to cheating.
Also, like I said, you and your husband can both be hurting. In the aftermath of an affair, sometimes forgotten, is that the WS is also hurting. Of course, the focus in the immediate wake of discovery is that the BS is the hurt partner, and while that is absolutely true, pain is not a zero-sum game here, you are both hurting tremendously. You are mourning the loss of a relationship with the AP, no matter how superficial it was, you still had a closeness with this person that you can't just shut off. While you are not going to get any sympathy from your BH on the mourning of your loss of the relationship with the AP, it is important that you grieve the loss of that relationship properly so that you can move forward and heal, because before you betrayed your husband, you betrayed yourself and your self-proclaimed moral code of fidelity. At some point soon, you will have to grapple with how you betrayed yourself and being able to forgive yourself. If you are not able to forgive yourself, you will never be able to properly ask your spouse to forgive you, should you get to an R situation.