I am a newbie here as well, and I was struck by the similarities of our situations. I am 41, my wife 33. It looks like she is stuck in the throes of a MLC and is WAW. I left the house to give her space a month ago and am struggling with the exact same emotions as you are. I have only text/email communication with her for the most part, only met once in 4 weeks to talk. It is really hard. I don't know how much advice I can give you as I am living the same roller-coaster of pain as you are. For me it has been a revelation to realize that this is all about her MLC and the only thing I can do is try to hang on for the ride, give her the space she needs, make the changes to myself and hope that she realizes her mistake at some point.
W 34 Me 42 Married 7 years together 8 0 kids 1 beloved dog BD 4/6/2018 I moved out 4/7/2018 I moved back in alone 8/05/2018 I file 3/06/2019 D official 5/7/2019