Hello OP
I wanted to hold your hand.
I've worn all the shoes in your cupboard.
When I was early twenties, my dad left for a woman my age. Well, exactly a year older than me and a year younger than my sister. After 27 years with mum.
My mum fell apart. We looked after her. We neither begrudge looking after her and we are very close as a result. Please stop worrying about your children. Please tell them you're really hurting but you know there is still so much love in your family you will get through it.
My ex husband walked out for another woman completely out the blue. We had been together 18 years. My DC were much younger but are similar ages to yours now. Ex continued to put them through the mill and they haven't seen him for over 3 years now.
Everyone is right. You will heal and you will be better. Don't rush it because you can't. You are doing exactly what you should be. Minute by minute and day by day.
Your younger DC are also really angry with their dad. The not talking and not saying 'dad' are their coping mechanisms. Just tell them you understand their choices and that talking time is always available.
If you don't tell them your FEELINGS they will mimic and bottle theirs up. Find somewhere in the middle with them. Tell them how sad you are - tell them a light version of your feelings. Let them know they can share their feelings with you.
Keep posting. Keep in touch with your GP. Book some counselling.