Oh look, another story romanticizing jealousy. sigh
Jealousy is a real thing that is really usually attached to love. Letting it rule you is bad, using it as an excuse to treat someone badly is bad, but having it is just the way things are for most people. If you want your stories to pretend otherwise, you want your stories to be fake.
Re read chapter 1. MC's friend is like "if you're not jealous of him then that means you don't really love him, when you find your destined person you're defs gonna get jealous of them." and that's never questioned, it's just accepted as is.
That's romanticizing jealousy, i.e. treating it as something good and expected, or even as a requirement for love, instead of what it actually is (a manifestation of insecurity, whether warranted or not).
I love stories about jealous characters, I like my characters to have flaws and problems, I just don't care for the way jealousy is portrayed as a good thing in chapter one.