Ping - to go dark - for real - it is effective - I don't know why.
My first W (yes I am not good at this M thing) walked away for another guy (....I see the pattern too)... she said that she go married with me but, she actually didn't believe in marriage(?) I was shocked - I pleaded bagged, etc - she packed and left - luckily we had no kids - I got so mad I cut any kind of communication with her. I was over, done.
After a couple of months she follows me in a cafe' and started crying that she wanted me back, I didn't have ANY contact with her for months and I was shocked to see her.
For me was too late, and I could not forgive what she did.
Some common friends told me that for a year or so she was saying to them she was going to do ANYTHING to get me back, but by then I got remarried (yes it WAS too fast).