I will tell you statistically that therapy does not save marriages. If your husband did go, but felt like he was forced to do it, he would not be going with his heart in it. He would probably be dismissive, rude and argumentative.
I would also look at how you are asking for help. Do you stay home with you kids or do you also work FT. Give your husband some downtime when he walks in the door everynight. Let him have 30 minutes to read a magazine, sit on the toilet (that's what mine does) or whatever. He may be calling your bluff, but to me it sounds like you may calling his too.
My husband also hates to communicate and talk about the tough stuff. There are numerous times that something bothered me and I would try to talk about it, he got defensive and I would eventually turn into a B**CH. I have really honed in on how I am behaving which has helped us both turn a corner. I wouldn't call it quits just yet, unless there is a lot more to the story. If he is just lazy about housework, well there could be worse things. Also, I would back off on the talks maybe. For awhile I felt the need to have a discussion about everything, now I'll sit on it for a day and if it still bothers me, then mention it. Don;t get hung-up on the fact that he is refusing therapy, most guys do. It's not in their genetics to seek therapy to talk about their problems, that is not how men work.