Am I stupid? I don’t really get why they don’t like each other anymore? I just kept reading and thought it would be explained more. Does protag like Aoi again? Was that what was implied earlier?
Makoto felt compelled to go out with Ryuji because it seemed like the only way to not lose him. It was forced -- although it wasn't either of their intentions for it to go down that way. Eventually Makoto realized that their feelings for Ryuji weren't love and couldn't become love.
Meanwhile, Makoto had been feeling tinges of
something whenever thinking of Aoi for a while now, including during the relationship with Ryuji. Makoto is only now starting to become aware of what those feelings are. (and uhh... The commenters on MD as well, I've noticed... srsly was legit a bit painful seeing everyone jump the gun getting so excited for a relationship where the writing was on the wall practically from the start..)