How can I help my friend?

[scribbles1980]

So long standing friend of mine. He is a truly lovely guy.
Wife has suddenly decided after being together for 28 years she no longer wants to be married.
Could write a book about the things she has done. She has really really been nasty
She has now been saying (and I think this is a way to get legal aid) that he has been abusive over the last 10 years of their marriage.
I know for certain this is not true. He is in absolute pieces. He is still very much in love with her & didn't see this coming at all.
I don't now how to help him.
Also how does he prove that she is telling lies about the abuse?
I wish he could start hating her but he feels that life is not worth living without her.
Any advice would be greatly appreciated.

Thank you Lovely and Odfod
I have been trying to help with talks & great advice about food and vitamins.
I know he hasn't been eating properly.
He is having counselling. She said that his wife is emotionally immature.

She also said that (after hearing what his wife has done since the split) she is the abusive one.
He does feel better after seeing the counsellor but the next day he feels bad again.
I suppose it will take time. I think if she gets legal aid she will try & drag him through the courts.
But thanks again for your practical advice. I really appreciate it.