I can see where you're coming from. That scene can be a mouthful (pun not intended)
Although, the author did warn that this specific update could be a bit rough for some people's tastes, so I don't think you have to worry about Haruki being like that in every update going forward.
I mean, he did come all the way back to school a few hours later, to just say goodbye to Yuuichi, right?
So, I'm certain Haruki cares about Yuuichi a lot - just not showing it.