The fan favorite won, nothing more or less. The whole manga was about Aoi, helping her out and coming together, she had the biggest development and was the focus of the story ...
Botan was just a stupid side plot because the manga needed some lovely moments in between. And then, in the penultimate chapter:"Nah Botan it is". WTF!?
And Aoi was ( again ) left alone by a boy and nothing changed at all. The author tried to retcon her feelings a little bit to justify his decision, but it didn't feel right.
Botan would have been a perfect "best friend", but being main love interest while dumping Aoi? Nah sorry.