How much do you want to bet the final chapter will not explicitly state if Fuutarou picked Yotsuba correctly, and there will be some publisher comment about how "we are supposed to know who he picked based on our love for the series?"
I get the overall premise of what's going on, but seriously, MC has a childhood friend who is willing to ignore the fact she was rejected and will happily jump into the MC's arms if he so much as asks her to.
Any reasonable person would just let it go.