For me it was a simple thing that occurred to me, enough is enough. I just had enough of texting the W once a week getting a "thanks" answer. Something just switched off, cannot describe it any better or differently. I think you cannot work towards it, cannot plan when it is going to happen, is simply just happens. I still love me W very much, just going dark and need to become detached.
ME:51 W:46 M:25 S:22, S:20 Divorced 16/9/15 BD 10/12 W left 12/12 with OW, affair confirmed Nov/12. Dark since 6/13 I"m in a new relationship since Feb 14.