I see the concerns about Julia's sudden relationship start in Chapter 1, and I'm happy to say that I'm addressing this in the upcoming reworks update (coming soon-ish).
This update will not only include more content for Julia but also for Kimberly and Olivia, so you can get to know them more before deciding to commit to them, or not.
Kimberly wasn't originally meant to be an LI, so there's that. As for Julia, I did move things along too quickly, but the reworks will fix that, along with many other current issues.