Wife no longer in love with me

[cam]

I'm thinking about 'going dark' on this whole situation now. I'm read a little bit about it, but not sure if its appropriate for my position.
But I'm just sick of dealing with it.
I'm trying to fight for someone who has completely shut down her feelings for me and can't see any positives of being together. There would be absolutely no contact from her if I didn't initiate it in someway, and I really feel she has now moved on.
I'm not sure what this will achieve, but I'm just done now. I don't want to see her on the weekend, and I don't want to 'talk' anymore.
She has made me feel so guilty and all to blame for getting us here, even though I have made so many profound changes to my life for the better for us. Just all too late. Last weekend was the clincher for me - she really showed she doesn't care and there is no turning back for her. She has gone past the point of no return, so time for me to just stepa away and let her go to find the 'happiness' she craves.