He didn't know how to clearly demonstrate that he was jealous. Maybe he was stupid, maybe Ryan is just being silly.

No, the way that actor looked at you. The media cheered and said you had chemistry with that guy. You and this actor were doing a series together. And Ryan was on a different project.

When the publicity event is over and you return home, Ryan was so quiet it was surprising, even for him. He avoided you whenever he had conflicting feelings. He was cute, but he wasn't doing the right thing.

And now he looked at you while his mind was only on the scene of you smiling at that stupid actor.