emz2u, that is a hard one. I am guessing you had no idea he could behave this way (ie. unreasonably), until now when your PhD is rocking the relationship boat? It is hard when two things are so important to you personally - your PhD and your relationship.
Maybe you need to sit down and have a calm talk about it to him and explain that your PhD is important to you, and that you need him to be patient, a bit less demanding, and more helpful around the house.