Looking for some help, advice and guidance...

How do I deal with the following feeling that I have: that what happened was just not fair.

Any thoughts very gratefully received x

Me: 48, XH: 42
T: 18 years, M: 15 years

EA/PA 1: 6/2012
EA/PA 2: from autumn 2012-present

BD: 5/2013
ILYBNILWY BD & left: 10/2015

OW conceived: 8/2016
Born: 4/2017

H filed: 7/2017
D final: 28/12/2017