Fell for the first one who didn't treat her like a princess.
It's ...well, a bit trite, but also kind of believable. Being drawn to someone who exists so outside of your lived experience isn't really all that unusual, after all.
Unfortunately for her, he's got an almost literally-fated love, and there's no room for someone as mundane as a "normal human high school girl" in that.
But, optimistically (and maybe a bit generously), perhaps this will help get her to open her eyes to everyone around her a bit more, and give someone else a chance once she's able to see more than "just the same boy with the same intent" over and over again.
I don't think this series needed the extra self-fulfilling losing heroines, but if that's what we're getting, then I appreciate that they were at least somewhat grounded in their attraction (childhood friend, princess who 'met someone different'), and that their confessions & rejections were resolved without a bunch of extra dragged-out chapters.