I've NC.
OH and I are not getting on. This isn't new, we've had a lot of rough patches throughout a long relationship (over 10 years). We used to have a long distance relationship and I put a lot of our issues down to this (it was the only thing we argued about). Since moving in together and having DC, things have got worse. We disagree a lot on things like how to deal with sleep issues (DC1 has been a dreadful sleeper and DC2 still wakes regularly - although is improving slowly) and discipline - I take a much softer approach although I'm aiming for sympathetic but authoritative rather than a pushover
. He's more of the opinion that you have to show them who is boss otherwise they'll be manipulating you all over the place 
However, the problem is bigger than this. We hardly talk - he's never really been the talkative type but he can manage to chat to his mates in the pub but hardly says two words to me some nights. We have no fun together. I feel like he has no respect for me anymore, he often talks down to me although we both have degrees and pre children, I was the higher earner. He doesn't listen and when we argue, we just go round and round in circles. He can be petty and sulk and it makes my blood boil - I struggle with my temper when he can remain cool and condescending. We're supposedly engaged (he proposed when I was pregnant with DC1 although I suspect that was in part down to our arguing over surnames....) but there is no current prospect of getting married. We own our house jointly, but as tenants in common (he put down the vast majority of the deposit). He has not made a will despite much nagging and concern on my part - he is fairly well off and I worry about the DC inheriting early and wasting it - and also that they would inherit his share of our house rather than me!
But I really don't want our DC to not live with their Daddy, they adore him and he's a good father and positive influence in their lives. It would break my heart for them not to see him every day. A long time ago we did have a good relationship - can it be recovered?
I struggle to get him to even talk about the problems, he just withdraws and is non-responsive. I've always wondered whether relationship counselling would help. I'm not sure if he would be up for the idea but maybe if I explained that otherwise, I'm not sure there is a future for us?
Has anyone been through counselling (I'm thinking probably Relate), and did it help save a failing relationship?
TIA and sorry for the essay...