I need of advice from Belgium

[Glenn82]

Dear people of this forum,

My name is G and I am from Belgium (Europe)
With the help of YouTube I found the video’s of Michelle. Which are in my opinion and situation very helpful “psychological” at this moment. Likewise this forum that I read some days ago.

I am 35 and my wife E is 31. Now in October we will be 14 years together and 4 year married. We know each other from university. She is and was a strong “alpha female” and I a “alpha male”. Our relationship was wonderfull, almost magic. Never were there arguments or fights. Everything fitted. We were that lucky people everybody wanted or was “jealous” about 
KISS would say: We are made for loving each other . And she is a real woman. We have/had a gret fulfillment and a lot of joy together.
We have three little children: a daughter (7), another daughter (5) and a son (almost 3).

Two months after our wedding, there has been diagnosed cancer with my mother in law. She died lately on 11 february 2017. I have the feeling Elise has not yet been really grieved about her mom. Everybody notice it.
Last three years my wife was several times unemployed, at a given moment she was a teacher with a lot of work in the evening, at the same time she studied for giving teach, her great grandmother died 2 years ago, her grandmother died 1 year ago, we were rebuilding a house, we were blessed with a third child that was always welcome, I had some months of financial troubles at work (nowadays very good again), she has a sis of 25 wich is low gifted,…
But we all dealt with it off course.

BUT
Lately in November she getted a job. With a temporally contract till September. There was a guy, I would rather say a boy from 27. He still lives together with his parents, he is 20 cm smaller than her, weighted almost 100 kg, is a real nerd, plays playstation and foremost boardgames, has never had a girlfriend,…
Once E called him “her best girlfriend”. He has a working contract till this month.
At a sudden moment, at the edge of April she announced the bomb. She wanted a divorce and she doesn’t feel anything for me. And that she want to be with that guy and it is amazing, they are soulmates … You know the stuff…
She want a divorce for asking for a new mortgage to buy a new house with him.
We had a real sexdrive, but she says it happens with him but is foremost not anymore important in her life.
They are texting each other like crazy, Elise is into boardgames, she plays Pokémon like crazy, sometimes she spends sometimes the night with him or she comes back home very late at 5 am.
After 4 weeks I decided not to sleep together anymore, but she could the first weeks.
She want a divorce, but I have been calm, so divorce papers are not yet filled in.
We still “live” together, but I am doing “no / less contact” and have “a life of my own” (I go out, I am working out, I am very adventurous, …)
She texts him or calls him at home. She has no respect for my feelings. I have been said different times that she has to leave the house and rent something with that “boy”. But no first she wants a divorce that she could buy a house and then she will leave!
Now she is on a holiday with him and his family and our kids.
I think of the passing away of her mom, she has been “attached” too that guy and het behavior is not “normal”. I don’t’ even really recognize my wife.

What can I still do? I need really advice.
My marriage is really worth saving. I don’t give up yet! Beceause I would regret it when on my dying bed some decades of now.

G