He shows you he cares when he comes knocking on your door with take-out chicken soup while you are sick.
If he can’t do that, he’ll at least text to check up on you and see how you are doing.
He will remember all the stories you have told him. He will ask you things—private, personal things.
He will remember how you take your coffee and why you don’t like pineapples on pizza.
He will remember because he pays attention to the one he is in love with.