Tadano connected the dots almost immediately. From the moment Manbagi said she has a crush, his mind went to the scene at the hotel, so he's already conscious to the fact that this guy Manbagi is talking about most likely is him. Then when he asks her what he's like, she says they're just like him, which he'd have to be an idiot to not realise at this point. Then, add he fact that during her rant, she said a close friend of hers likes the same guy. Assuming Tadano has actually come to the conclusion that the guy in question is him, what he'd probably be thinking now is: who is Manbagi close with that is likely to have a crush on me too? The answer to that at this point would be obviously Komi. So to say that this chapter showed no progress is just wrong. Maybe not the confession chapter we were hoping for, but things are still moving along.