He knows something’s wrong. Don’t try hide it or maybe do, he’ll find out eventually. He has a sharp eye from battles and being quiet, he knows to spot something unusual. Like when he noticed your eating habits were lessening and lessening, your snacking stopped, your big full school lunches you used to make became nothing but an apple.
Jotaro liked you the most he could like someone. He liked your honesty, how you never let comments affect you, how you ate what you wanted and didn’t care what others thought. Especially him. You were a breath of fresh air in a polluted world, you were soft, warm and warm in the hard world, you didn’t annoy him(that much), you didn’t go out of your way to annoy him or find him, you were a good person to him and he liked it. A lot.
So when you both met on the rooftop of the school, sat in your usual seats and Jotaro pulled out a lunchbox, you looked surprised. He never brought lunch, he only nibbled on your lunch or had a cigarette.
He opened it and inside was an array of foods, homemade and a lot of love put into it. He put it on your lap gently, pushing his utensils into your soft hands and pulled out a cigarette for himself. Not a word shared between you two.