
FL: I fear him to death and he threatens me at every turn!
Also FL: ....This must be love (〜 ̄△ ̄)〜

Not yet but we know where this is going ☠☠☠ he looks endgame but still, he murdered her father and might murder her brother too in the future who knows. Like this dumdum is already pitying this all-round villain with no redeeming traits so far, even joking with him. He's blackmailing, threatening and using her. Who would have any goodwill towards him after all that? FL apparently

Exactly, she made him so she knows (and we've seen her think it) that he's a cold-blooded, cunning, and brutal murderer with no remorse. She made him a villain and not a pitiful one either. Would a villain still be a villain if they didn't deserve their bad end?
Honestly it's just a bad set-up. The author (the real one I mean) should of introduced them a different way... unless she/he's aiming for a tragedy.

I started reading this in elementary school. Will this never end?? Are they even together yet? Don't tell me they'll get together on their deathbed right?

Yes, they are ageing, but as drope said in another comment, it was least than 2 years, I think In one ch they stated that it had been one year since kyouko joined the company
Btw in Conan only 9 months had passed since the beginning lol (they said it canon in the manga "recently") it doesn't have sense I know, but in the lastest chap they are keeping the time storyline pretty much at least lol
Why is she so passive? The novel FL had gone to him for investment not the other way around! She prepared a lot to convince him but he gave in easily. This is too much. He's being too obvious too early. Quit hindering the independence of FL bro!!
So the novel differs from the manhwa huh
And where can I read aid novel?
and is there a translated novel?( ̄∇ ̄")
https://www.novelupdates.com/series/i-became-the-sole-perfumer-of-a-tyrant/
they got until ch27