Even though I'm sure it hurts to have her go no-contact on you like that, it's actually the best thing for you AND for her I think. I just keep thinking of my buddy who's W left him and moved in with OM and went no contact on him for 2 years. It took her that long to realize what she left behind. They are back together and happier than ever now. Life is crazy!
Was she in an affair that whole time? How did she rengage and explain herself? How did he take her back?
She and my buddy had a home and a business together. She was kind of a typical WAS, she just decided she was done and wanted out. They sold the house and business and she immediately moved in with OM. This was before my sitch, so I knew nothing of DB'ing but my friend kind of came about it naturally. He just let her go and didn't look back. He went on to do his own thing. Partnered in another business. He never really dated, he's in his 60's and just didn't feel the need for it. Eventually she started texting him out of the blue asking how he was doing. They started texting more frequently and eventually started meeting to have coffee, then caught a movie here and there and basically started dating all over again. That went on for many months. They never had gotten divorced, eventually they moved back in together and just basically started a new R together.
I have another friend that did something very similar, but he and his W did get divorced and their time apart was way longer, like 10 or 12 years. Both had other relationships but then they reconnected and eventually remarried.