They can't be called just friends because if you think about their relationship with Kaede who's a real friend, then is too different ... They're too into each others now, the only thing lacking would be sexual desire, but yeah the way they look into each other's eyes, the phrases they use ambiguously trying to see if the other catches on and the way the hurt each others trying to communicate is special, you don't need to call it yuri or lovers, but it is a form of love unique to them.
Also what if she was pretending to be sleep.......hehe
Thank you for the update!! I was nervous when I clicked XD but now I'm pleased