Guess we can agree to that, but what >>12082342
says is true, I think.
Yuuno gives him a lot of presents, but he always takes them kinda hesitantly, accepting them out of politeness or not to make her feel bad. He never seems to feel too okay with it though. They're just friends to him.
Also, in that pic you posted, moments before they got into the whole musical act, Yuuno kept pushing herself against him, and Kurenai kept pushing her back a little. I dont think that scene quite supports your point of view hehe.
It's clear the nerdy girl doesn't like Yuuno, either. It's true she's a bit jealous, but she does get along well with Kurenai. She just doesnt like Yuuno trying so hard for Kurenai to like her as more than just friends.