Hi there Comesinwaves,
Welcome to SI.
A couple of things.
First, what you're describing is feeling a lack of connection with your BS and a sense of hyperconnection with your AP. This is common.
To quote Brene Brown, connection is the energy that exists between people when they feel seen, heard, and valued; when they can give and receive without judgment; and when they derive sustenance and strength from the relationship.
How long has it been because you have felt seen and heard and valued by your wife? How long has it been since your wife felt seen and heard and valued by you? Neither of you is able to be fully seen by the other because you are both hiding things. Big things. Just because you know your BS had an affair doesn't mean she isn't operating as if she is hiding it from you. And it goes without saying that you are hiding things from her, including the fact that you know about her affair. The hiding and lying means you won't be capable of real intimacy and connection with each other because you can't really be yourselves.
I went through some very similar thought processes about my BS and my AP. I thought I could really "be myself" with AP. I felt like he "got me". And if what we were doing was wrong, it felt like we were both broken in some special complementary way that meant that we may be broken but somehow when we were together we were okay because we were so accepting of one another's brokenness. The grass looked oh so much greener on the other side of that fence.
The truth is that feeling of connection you have with your AP is a hotwired one that is founded on the worst, most fucked up brain wiring that you have. It literally is a drug, and if you go through the process of detoxing, followed by the work of identifying the broken thought processes you used (and are still using) to justify this choice and then take concrete steps to actually change out these thought processes for ones that are wholesome, you will see it too. You will never be able to change the fact that you had that relationship with AP and you had those feelings and thoughts about her at the time (including right now), but if you go through the process described above, you will definitely change the way you relate it.
The starting place is committing to integrity. Integrity is choosing what is right over what is more fun, more convenient, faster or easier. It requires honesty; no way around it. I don't know if you will be able to build a new relationship with your BS that is based on a true sense of connection, but I do know that if you are cannot be honest with her, and she is not able to be honest with you, it will not be possible to achieve.
Second, that guy Lucky77 that you can so relate to? To my knowledge (please correct me if I'm wrong, Lucky77) he has still not told his BS about his affair. When he first arrived here his posts were very much like yours, he was trying to get through withdrawal from his AP. He was advised to come clean, has been advised to come clean, many, many times because dragging the affair out into the light is a necessary step in changing how you relate to it. It is necessary for healing. And you know what? He just told you that, three years later, he still thinks about AP every damned day. He's become an expert in white-knuckling.
The grass is greenest where you water it. It is healthiest where you weed it, feed it, nurture it and care for it. So really it's up to you whether you are going to step onto the path of true healing or if you're going to stay in the same place.
Your marriage may or may not be salvageable, but you definitely are. Life with AP is not something that is ever going to be a healthy option for you. Start educating yourself on the true nature of infidelity and how it impacts the people involved. Focus on fixing you.
Proceed with conviction and valor.
Best to you from a fellow EvolvingSoul.