concerned about male friend

[sonicfox]

i have a male best friend. have been best friends for years, met at work. im gay and have a partner. he is married and has a wife of 20 years and three children. ive met his wife and kids lots.
my friend is a very private person. doesnt give much away about his personal life but he has seemed on edge recently.
he broke down a few months ago and told me his wife wanted to leave him. he didnt say what happened but i got the gist she doesnt love him anymore. he said they havent had sex in years. she goes to bed when the children do....she had an affair a few years ago but he forgave her. things havent been right since.
i told him he should leave but hes in a lot of debt and cant leave financially. they are both stuck in an unhappy marriage because of money. aparently the kids are fine and they dont pick up on it.
its none of my business but there must be a way out? does anyone else settle for this? the kids are still young. they own a home and cars. both work.
he is miserable i just wish i could offer some advice. he says he doesnt want to leave his children either.

Without knowing all the details its hard to advise. There is always a way out though if you truly want it. I wonder if he's using the excuse of the debts to not have to face the problem head on? Staying together for the kids is never a good idea. He might tell you they don't pick up on things, but I guarantee they will have. Children can internalise things a lot.
He needs to sit down with his wife and agree how they can separate. It may mean selling the house. If he's in debt I assume he won't be able to buy her out. I would also advise him to see a solicitor.