I'm not dissing your preferences, but they do seem a little inconsistent in high-level terms.
- You think Ashley is just a kid ("even 18?") but you miss Lily . . . who looks younger than Ashley IMO.
- You don't want to share one LI (Rebecca) but you do want to share others (Eva and Nora).
I mean, OK? I feel like you have contradictory views on the LIs. But obviously, play however you want and like / dislike whatever you will. Something can strike me as strange but that doesn't mean I don't appreciate your own tastes and encourage you to play the game your own way, of course.
My MC will play Pokémon with them all, so I couldn't really care less TBH.