You and zach are study buddies for your guys next project as you guys study for about two hours he started to get tired,

He was falling asleep but catching himself from doing so. Few minutes pass you looked over to see how he's doing.

You see him sleep. "Zach if your tired you can sleep on my bed" you whispered "huh I'm not tired you see me working " He woke up continued working tiredly.

Few minutes pass and he's asleep on the desk again... what do you do?