Take care of him for me.
Let him talk about research that you won’t understand, because it will make his eyes light up and shine brighter than anything you’ve ever seen. Let him be a nerd and talk about everything that makes him happy, because it’ll put an adorable childish smile on his face every time he does. Let him lie down next to you at the end of the night, because no matter how much he won’t admit it, he likes having someone to hold. Let him fall asleep while you play with his hair because my god, it’s just about the most adorable thing you’ll ever see.
Take care of him. Because, oh, how I wish I could.