That was quite sad for Shizuru huh, she opened up to a friend for the first time and it backfired a lot. Resulting in her losing her "Friend" and becoming the weird girl of the school. Momose is way pettier and mean spirited than i thought, even if it was mostly not understanding and jealousy. Shizuru was too nice for her own good again, Maybe Misaki will be a nice friend for her in the future, seems like the last page kinda hints at that.