With two little ones you've seen a lot of changes the last 2 years. It's easy too put the marriage on the back burner but unfortunately at a price. Good for you for wanting to fight for your marriage. It is the glue of your family-don't let it go!
I don't have a name for you, just some books that helped me through tough times with my hubby. All are by Dr. Laura Schlessinger: "The Proper Care and Feeding of Husbands", it's companions "Woman Power" and "The Proper Care and Feeding of Marriage", and 10 things Couples do to Mess Up Their Relationship".
Reading this does take a lot of soul searching and admitting areas where you lack as a wife, which can be hard to swallow at first. Basically, though, you hold the power in the marriage. When I turned myself around, it was amazing how quickly my hubby followed suit (I'm talking just a matter of days!). Your marraige is worth it and these books are probably cheaper than a counselor. Good luck to you both for your kid's sake.
PS-have your hubby read them all along with you with the esception of "Woman Power." Dr. Laura also has a new book called "In Praise of Stay At Home Moms" due out next week. That may give you an esteem boost.