I can't take it how are they so cute. I really love how, while they are obviously shy and don't want to verbalise their feelings, it's apparent to both of them that they feel something more for each other than basic friendship.
I don't know if he went to check on her simply because he was jealous, or at least if that was something he himself realized he was doing or not, but still. I am not sure either of them realize just how much they clearly mean to each other, and how much they clearly like each other, but yeah. And that smile at the end... that was a real proper honest to god smile... she's making progress.