Help me help my DS

[mirren3]

DS is 34 and has been with his girlfriend for 8 years, they both have good careers, cars, holidays etc. No children and no plans to have any.
On Christmas Eve DS came home from work and she said she had fallen out of love with him and was going to stay with a friend. All her stuff was already in her car.
She stayed 10 mins then left, saying they could meet in the new year to discuss the split.
DS is shocked and very upset, and has been crying which is not like him.
This is the first time anything like this has happened to any of our DC so I'm really struggling with what to say, he's hoping she'll miss him and they will get back together, I'm worried she has met someone else although I have no proof of this, and don't think she would do that.
How can I prepare him to accept it might be totally over? Or any other advice that can help me help him.

Honestly, I think a person has to navigate their first heart break for themselves. As hard as it is to witness, it is a feeling like no other, especially for the first time. There really is nothing you can say or do to make things feel better for him right now. I recommend encouraging him to stay with you or with friends so he's not alone, encourage him to exercise, eat healthy, avoid alcohol and keep busy. She may well realise she wants to be with him after all but it does sound very set in stone and not like she wants to work on things together. Just be there for him and let him talk, as I'm sure you are already.

You need to give him space. Be there to talk if he wants to, but avoid dispensing too much advise. He will get through this but he needs to figure it out on his own.

I’m not sure what has happened here, maybe an edit is needed? Makes no sense

Sorry re read this, it seems like she’s moved on, so sorry for your son :(

Why sorry, it was 3am where I am.
Thanks for all the advice, I'm encouraging him to see friends etc, but he just wants to stay in with us just now.
I'm giving advice if asked, I'm being very careful not to say anything detrimental about her, which is hard, we'll get him through this though.

When something like this happened to me I was grateful that I was allowed just to be quiet at home with no interference apart from being encouraged to go for a walk everyday. Do you have a dog?

He's been injured, not physically but emotionally. He needs time to rest and recover, just like he would if he'd broken a bone. It's hard but she's done the right thing by doing a clean break, whether there's anyone else involved or not.

Yes, we have a dog and he's been walked and walked and walked. He's a Lab so will go on for ever if he's out checking his "pee-mail".
DS is not due back at work until the 3rd Jan, he says he'll go home either the 1st in the evening or early on the 2nd.
Apparently they will meet on the 7th to discuss money, house etc.
Thanks again for the advice.