It's a bit frustrating to see the lack of communication but I guess that's just a characteristic of teen romance. I hope there's some more development on Iroha's end in that she would just talk about her feelings to Haruki though. The low EQ and IQ protagonist trope is kind of getting to me.
Though, if this roundabout way of reaching the resolution means we get to see more of the Haruki in the last few pages, then I'm not complaining.