For those still following: I'm now able to share.
My wife of 19 years, partner of 22/23 years, fell out of love with me without me noticing or being told. She moved out early August.
I tried, so hard, went on dates again for a few months but nothing changed her side. She then stopped allowing me to take her on dates and reduced talking.
Due to zero warmth for 6 months and so much emotional pain my feelings have dwindled too.
We have agreed to divorce.