Anotheron3... I don't know why I was compelled to post, especially since I spend the vast majority of my time lurking here, but for whatever reason, here goes it...
You'll come out of this just fine. So many wonderful people here to help because they know how it feels. Their love and concern is healing and instructive. They saved my life (Hi Bigger!).
It's completely understandable where you are and how you feel. Understand that betrayal is the toughest thing for a psyche to work out. There's a reason that betrayers and traitors were on the bottom ring of hell, right next to Satan, in Dante's classic "Inferno".
She took the best part of you, your oft-blind and complete trust, that a well-adjusted individual gives to few in life, and used it as a shield to hide behind as she allowed another person into her, but worse, later, as a weapon against you.
Let that sink in. You're where you are because she committed an emotional crime that most would prefer death to. If your "data" is correct about her affair turning physical as a direct result of you taking a stand, then she certainly attempted to use your heart, your trust, against you.
You must now take complete charge of yourself. It is over. No more damage from her actions. 180.
I'm not going to get religious, although some religious texts are quite instructive psychologically. One that stands out is the Golden Rule, "Do unto others that which you would do unto yourself", or one of many similar translations. People take this as "treat others as you would treat yourself", which is a good rule of life, but there is a deeper layer. This is that the opposite is also true. If you are a person who strives for good, and loves others as himself, the only way that you can love completely is to love yourself first and love yourself properly. "Love yourself as you would others".
It's time to love yourself, to step outside and you yourself take the advice you would give others. 180. You need no more of this. You must love yourself now, or you will find it hard to love others in the future. When she lays the next trap, and she will, love yourself with the love that you once gave to her, and take the advice you would given to those you love, and not let your aversion to facing betrayal head-on get in the way.
The 180 is not about making the other person pay, although, sometimes that ends up happening. The 180 is another path to self-realization, through a voluntary withdrawal from infidelity, deceit, and betrayal. You MAKE yourself break those psychological ties that, in trust, were beneficial to the relationship, but without fidelity, are poisonous- unhealthy. The side effect is that it also leaves the other person to their own devices. That's when the weirdness starts. You thought that it was messed up now? Perhaps. Perhaps you've seen nothing yet. They have psychological ties as well, parasitical ties, but ties nonetheless. You'd best love yourself and start taking the advice that you'd give others when those "weird" episodes occur, especially when the OM starts wondering what he signed up for!
I have this feeling that you're going to come out of this better than ever.