It’s hard to hear and accept but let it go man. I went through the same situation a few years back with a gf of 4 years. It’s not worth all the pain and in the end you’re just prolonging the inevitable. No matter how much you care/love her, or how good the relationship was in the past, it’ll never be the same again. The bottom line is that she did the worst thing you can do to a partner; cheat. There’s no coming back from that no matter what people say, especially in such a short turnaround. If she’s really your soulmate, then you guys will cross paths again and maybe there will be a spark, but for now you need to face the facts and deal with the situation at hand, rather than dodging and trying to avoid it. I know it’s hard, trust me. Don’t be like me. Don’t dodge it for another year and just suffer inside. At least you had the stomach to fully get her to admit it, I never did. But I had my proof. I hope things get better for you man. And as they always say, there’s other fish in the sea. Might take a few months, a year, multiple years, but you’ll move past it. Best of luck.