Hm i suposse you could always guide his hand to the palces you want to be touched, you'll have to initiat everything which is way hard when there sleepy but it can be done if you start by kissing him passionatly and then as i said if you touch him or guide his hand where you want him to touch you keep him intrested and alert
Try to make him feel like if he wants it more then you do, play with so you can get his attention when he is tired
If he is tired let him be. You would want the same respect. You don't want him to begin to think of your advances as intrusive and negative. He isn't a machine (neither are you) and shouldn't be expected to respond like one.