I have sinned

I don't understand how this happened, but I cheated on my wife. I am very ashamed, but it happened and there is no getting away from it. I do not know how this can be justified and whether it is necessary. the only thing I can say is that I still love her. so I told her everything at once and did not hide anything. She immediately started talking about divorce and even found Utah divorce forms online. Now I do not know what to do, how to regain her trust and is it possible