Uchi has been trying so very, very hard to deal with Tomoko as just another human being. What's strange is that the more she does, the more like the "old" Tomoko she becomes, skidding out of control because she tries too hard, ignoring help because of the misery of isolation, and being unable or unwilling to read what others are thinking or feeling. What's horribly ironic is that Uchi is reaching this new relationship by wandering outside her social comfort zone, the same as Tomoko, except Tomoko is rising and Uchi is falling. At least Uchi has fantastic friends.
By the way, for you folks who have been irritated that Uchi has not been developed as a character...be careful what you wish for.