Being a stay at home mom is one of the most miserable jobs if you're not cut out for it. People understand a bad day at the office, but they seem to think staying at home with a kid means it's like a vacation day all the time. You can't vent to anyone without them reminding you that you should be grateful to your husband.
My husband doesn't see a problem with it, so couples counseling is off the table. Honestly, he doesn't have to worry about another guy - I don't want someone who is going to make more demands on time I just don't have. But If I were him, I'd start worrying that being alone seems like it would be less stressful than staying with him.