I don't know if it's okay to bring up other threads (new, or newish), but I did a search after you said something that made me think you had posted about him before.
He really sounds awful.
And not just b/c you're only posting about the bad things and not the good. His overall attitude toward you. How little respect you're entitled to vs. how much he's entitled to.
If he is cheating, I wouldn't be surprised, b/c, again, he really does not seem to respect you or like you or value you. (Which would not be b/c of anything you did. You're not fun anymore? Well, 1, that's right you're not, b/c you're spending all your time trying to compensate for a grumpy, neglectful, entitled shit of a husband. And 2, he's not much fun anymore himself is he.)
I get not wanting to be divorcing at 26. But better that than divorcing at 36, that much more worn down from another 10 years of this shit.
Have you had the "one more time" chat before? Kind of sounds like you have. If not, and you want to, then sure, but as people have said, set some short timelines for the outcomes you want and stick to them. And if you have had the "one more time" chat before, then I would not have it again. You're so, so young. You could have a lovely life right now.
Sincere apologies if it was not all right to bring up your past threads, I don't mean to be rude. I really wish you the best.