What have you been doing in the way of cooking, laundry, etc. for yourself? I wouldn't go out of my way to do anything extra in the way of accommodating him. If you have a meal ready and on the table, go ahead and eat...do not wait on him. If he is still not there when the meal is finished, put things away and he can reheat his own meal.
As for keeping house, keep it the way that you've been doing it since he's been gone. He's not a guest in your home. Do what makes you happy and is convenient for you. Until he comes out of the funk, he's a child and you as the adult, will need to determine what best suits you and your needs and time.
Learn to do what makes you happy. The lesson here is that you are not on this earth to make him happy. He needs to learn and discover that happiness comes from within.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
