Ron is angry, of course, he is.

He has every right to be.

It was evident in the way he didn't speak to anyone at dinner. The way he walked to the Gryffindor dorms quietly and got ready for bed without another word. The way he closed the curtains of his bed and didn't even say "goodnight".

No, he lays in his bed, silently seething. He's too stubborn to say anything. Instead, he rolls over onto his side, grouchily fluffing his pillow until he's satisfied.