Look, if some thot like Kirigaya tried to bully me, I would try to forgive and forget the first few times but if she didn't learn, I would have beaten her ass up (I did learn krav maga) and thrown her in front of a running bus. And if she had (still) survived, I would have cursed her with a voodoo doll. Forgiveness? Pfft. I would have made sure that bitch's life was ruined for good, both academically and socially.
But this is not my story. Neither it's yours. It's Tadokoro's story, and if she has decided to forgive her bully, then it's her own decision. To each their own. So some of you need to chill out a little bit. Stop forcing your views on what she or the author should have done and move on. (Also, this happens in pretty much every manga. What else did you expect?) Tadokoro's about to lose her virginity, show her some support instead.