Having a partner with mental health problems can be very grueling. Perhaps you could join a carer's/relatives group? There will be one local to you.
You didn't sign up to be his unpaid psychiatric nurse. When he goes on about his issues, you could say to him 'I can't help you, you need to talk to your GP/consultant/a therapist.' (Even when already getting help, he can still go back and let them know he's still struggling and they can consider additional help or a medication change. He can even tell them it's taking a toll on his marriage- this'll make them more likely to act.) That'll stop him going on at you so much and take off some of the load. It's also true- even if you were a qualified counsellor, as a loved one you're not in s position to help him as much as someone with a professional relationship with him.
You could also let him know when one of his comments upset you. Then say something like 'This is taking it's toll on me, please get additional help for my (and the kids'?) sakes, if you won't for yourself.'
Private therapy is often affordable if prioritized. I did it when I don't work, I paid for it with my PIP. ff he already goes once a week, he could step it up to twice, with a different therapist if need be if he's seeing one and can't get two sessions with them, once he's finished his current course he could try another. He could also call mental health helplines if he needs to talk about things extensively.
This will also be (or will be) taking it's toll on the kids unfortunately. They will be aware of and effected by his moods. This can damage a child's mental health for life, leaving them unable to work etc. You need to think of them and act accordingly, including leaving if you feel you must at some point.
If he acts funny in front of the children, have a word with him about that in private- 'what you did there could/your mood could effect the kids. You need to seek additional help etc.'. If he takes his moods out on the kids, call it out in front of them. My dad had mental health problems and it's damaged by sister and myself for life- I can't work and it effects my relationships etc.
Sorry if I've got a bit heavy. Best wishes. xxxxx
For better or worse, richer or poorer, sickness and in health. If he needs a less stressful job yet lower paid to improve his mental health so be it. And as someone who battles every day with their mental health i know it’s a constant struggle he will be having. If the good outweighs the bad with him stick with it. No one said marriage was easy!
@restingbitchface30 Yes but there are limits. OP is a person too with her own needs and limits to what she can cope with. I have bipolar, ADHD with autistic traits, personality disorder traits and some anxiety. I'm severely disabled. I would never want to make my loved one's lives more miserable than necessary, and would keep gettting more and more help to take the burden off them. There's always more that can be done. I would try not to ever make comments around my family that were a buzzkill. I know things can just come out of our mouths sometimes when we're distressed, but usually we're in control of our mouths and can consider how what we say might feel to other people. I'm not saying the OP's husband can't confide in her, but he should try not to be overwhelming, and there are loads of resources he can use.
Gone are the days where people are excessively trapped in a marriage for long periods of time. Yes, be committed, but everyone deserves a happy life.