The “crush” part seems to be one of the more confusing parts for players. I need to address that better, somehow, because it keeps coming up. It wasn’t meant to mean much, besides the mc admitting to himself that he has a silly crush on one of the girls.
The only outcome from that is that you can have a cute dialogue option with your favorite girl and gain the “Sweetness” skill for free.
It’s not meant to be a big choice, lock you with some girl, or even influence who you end up with at the end. Crushes come and go. Unfortunately, that doesn’t pass across, at all. Some players (for example in
fitgirlbestgirl's review) even think they are already picking who they will end up with: (!!)
So yeah… I'll try to, somehow, make this clearer in the next update. The only thing that the "crush" choice is meant to influence is how the player can get the “Sweetness” skill for free and with which girl he can have that "cute" dialogue option.