I have always left dh alone with the kids for a couple of days a month since they were babies. We even managed it when ebf, with the one child that would take expressed milk.
My dh is a parent, too. He MUST be absolutely 100% capable of looking after the kids on his own (we have three, two with sn - one physically disabled).
He still goes away with work. It's what he does. (He was in the army when we met, even though he isn't any longer, he still gets unexpected work trips for anywhere between a couple of days and a couple of weeks. Last month he was threatened with a indefinite trip).
This gets easier, I promise. Having little kids is absolutely knackering for whoever is at home. Yes, he needs time on his own with the kids to appreciate what you do, but you also need to understand that if he gets the opportunity for a fab assignment, he needs to be able to take it. iN EXACTLY the same way that you need to, if and when you get back to that point. What are you doing to resurrect your career?
So, work out where you are going (friends for weekend? Home for weekend? Visit to another city to investigate work opportunity? Hobby course in another county?) and sort it out.
You need a change of scenery, and to get a little balance back. You don't need a new husband. You really don't.
Have so totally been in this position (and actually went off at dh about it) but in reality, when less tired and felling less like an unpaid slave, I can be a whole lot saner about it. I know we are both trying to manage a family. On some occasions, this means I stay at home ft. On other occasions, it means we both work ft and employ a ft nanny.
Sit and plan how to get your family to work the way you and dh want it to - including what you want out of your career/ social life - not planning your divorce. And then when he gets back, sit down and discuss this with him. Preferably having got a babysitter and a night out at a quiet restaurant, and ordered a bottle of wine and a taxi.
This is so very very common, and it's just as easy to get locked into 'breadwinner and worker' role as it is onto 'childcare and domestic drudge' as the lower wage earner.
Don't give up on your family just because your current roles have become unbalanced. It's so easy to blame dh and become embittered, but in reality, it's also easy to readdress the balance in a more positive way.
He didn't choose work over you - he went and carried on with a great job because that is currently his role. But you need to sort out what role you need him to take on, and what role you want, and then get on and enact it.
I have had some seriously shitty low points. And questioned everything. But I really don't think asking your dh to not go on a great work assignment was fair in your current position. That doesn't mean I think your positions are right - it just means that at that point, it wouldn't have achieved as much as you had hoped.
If you are currently experiencing money issues, you need him to keep bringing in better jobs? Or do you need to reassess your work position and look to raise your income?
I really hate that women end up in lower paying roles, and taking the majority of the crap - sick days, etc etc. but I suck it up because I know in the longer run in makes sense for our family. My pride suffers, but it's fine. When I am in better paying roles it has been easier (largely because the child care gets farmed out, lol, and we take a more equal role).
But you do need to get away for the weekend, and plan to continue to do so. He needs to parent, too.