Sir have a read of 5 love languages by Gary Chapman. Infact buy two books and ask your wife if she is willing to focus on the themes of the book TOGETHER with you. Both of you make a commitment to focussing on JUST THE CHAPTERS of the book. Both keep a journal of eachother's reactions, revelations and reflect them with eachother.

You are male. Emotional turmoil is an unusual territory to move into when there is no guiding Captain moving your rudder into SAFE WATERS. Generally women are very good in this emotional territory. Often receptive wives are able to be the Captain of the guiding rudder into SAFE WATERS.

Don't get me wrong. Men do have emotions but they have not had the training from their mothers or their fathers to learn to navigate through them. If you have sons, they are watching the man in you. If you have daughters they are watching the father of children and the husband in you.

A credit to her. She is trying.
A credit to you. You are living in HOPE.

Someone said to me once or I read it somewhere......
There is three in a marriage. Husband+wife+marriage=Relationship
They had suggested "If Marriage was a being and could talk to you.... What would it say?" Ask yourself and your wife to ask the Marriage Being and compare answers. Your answers may surprise you both.

Draw the answer in pictures or glue pictures from a magazine if need be.

Hang in there. Separation is a time of GREAT REFLECTION. Do not be to rash or harsh on yourself. Your emotional wounds and scars need to be tended. By the way your changes are not a chemical hormonal imbalance. 52 (guessing your age) that needs acupuncture or vitamins or hormone replacement? Check the Biological stuff if you haven't already.

Hugs to you, your wife and your children.