Crazy how y'all can't even read. Asahi has literally said herself that all that's happened is that Mona fell in love after her, that's it.
She was an attention seeker and now she's changed. The premise of him being the only one to not look at her has become the premise of her wanting only him to look at her.
And Asahi doesn't have some misguided crush on Medaka either, she just fell in love, big whoop. She didn't even fall in love for something he did, she just fell. That's all and that's fine.
The characters in this series are visibly well-written and compelling to anybody who isn't out here projecting themselves onto Medaka and picking Asahi for him because they like her better.