I'm having a similar situation with my dh at the mo.
He had always bn somewhat moody (his mum warned me to think carefully before I married him 11 years ago!) and lately he's bn on another scale altogether.
Culminated over Xmas with a generally horrible time for me and the kids And it was hugely uncomfortable for family and friends who visited and endured his stoney silence.
Eventually after he failed to do anything nice at all to celebrate our dd's birthday earlier this month, I asked him to leave.
He left overnight, we talked late the next day, he decided to come back.
I've bent over double trying to make him happy, trying to do all the things that he said were annoying him. Whilst he has literally done fuck all. For the first week or so I just Cried the whole time, worried he's going to go again, worried about finances, about the kids, about what people would think.
Anyhoo, fast forward two weeks and I'm eerily calm about the whole mess.
I've started to get the little jobs sorted around the house that I wouldn't want to deal with if he wasn't here (and couldn't afford to on one wage). Got lots of little things done whilst he's bn at work that make me feel empowered and in control. Started to look closely at how I'd manage on my own wage if he wasn't here. Looked into child maintenance. Basically I've began to really focus on practicalities, rather than focussing on how sad I am and how much I want this to be fixed. At the end of the day, if he's not happy, he can mope around as much as he likes. He has no where to go. No real close friends, and his family hav told him they'll not put him up if he abandons his responsibilities. Even his parents have come down heavily on my side. He has alienated everyone with his ridiculous behaviour, whilst I have really taken the higher ground. Sympathised with him, accepted how he feels and not bitched about it all to anyone except my Besties and my parents!
What I'm saying is, yes it's ok to be sad and feel scared and worried. But in my case, I've started to move on from that and plan for the 'what if'. I always thought I loved my husband unconditionally but after the past few months, I'll never forgive him, so I don't know if this will ever be fixed. And I refuse to be a victim. If he chooses to leave then I will utterly prepared in the practical sense to cope on my own with the children, even tho inside I might be breaking up.
I think u'r at the stage I was at a few weeks ago, and I encourage u to look beyond what u'r feeling and start to look at the practicalities. One of my best friends told me I needed to 'man up' and start to be realistic and plan. Harsh, but it's the best advice I've received in all of this, and I really am grateful. Though I am an emotional mess inside, outwardly I am holding it together, and trying to plan a future where he isn't in the picture, incase the worst happens.
Sending u love and all the positivity I can muster my love, God knows, this isn't easy xxxxxxxx