[potchip]

Spoiler for answer:

Maria was initially unhappy but being Maria forgot all about it soon afterwards when it's time for Kobato and her to make up! (I mean..play)

As for Rika's comment, she referred to all non-loli members of the club, herself included. Kodaka apparently have this aversion to change to personal relationships. So in a way he already recognises there's friendship now amongst the members but is afraid to move beyond friendship or just confront the changing feelings. Other members are all on the offensive - Sena just assumes, Yozora schemes (and fails every time), Yukimura being herself and Rika teases half-heartly. Except Kodaka just backs away every time by playing dumb.