is this where stockholm syndrome happens or ?

yes

no, it's not stockholm syndrome, it never happens, Taekjoo just came to like Zhenya slowly

Nope just trauma

so taekjoo just ends up liking his kidnapper/abuser naturally and it isn't stockholm syndrome ? (i haven't read the novel) does he at least make it off the island lol

I'm pretty sure there was a split second under the starlet night sky where he started to see him in a different way and then snapped back to reality and eventually escaped but I didn't read much after he escaped.

I can't say i'm surprised but wow, i will be genuinely surprised he doesn't get stockholmed later

I can't stand zhenya omg he's so hot tho