I'm talking about feelings. Won't they suddenly become gay or confess their love to the hero? and what does the statistics give? charm, patience, knowledge, wisdom, bravery. which one to raise for which characters ? it is not written here because of this, I cannot purposefully raise one thing for the sake of the target character.
If I remember correctly I think the MC is bi (I could be wrong), the romance is also barely there for almost all characters in general (so far, only Green is the one that has more romantic content you could say, the rest just show some type of interest but nothing at the same level)
Just like ffive mentioned, some of them may "flirt" with the MC and the MC won't mind so you can get an idea
Also raising their levels will only give you some more rocks (I forgot the name), I don't think you gain stats (besides the friendship points) from "dates", most of the character only require points and you won't know which stat they may need until later on (once you reach an specific level and the box of the character wil show what stat you need, I think most of them required Wit and Charisma, after that I think it is Intelligence but honestly I don't remember all of them)