One of my love interests, Matthew is a yandere or lovesick because yan means sick to be blunt and dere dere mean lovey-dovey,
He's REALLY protective of the Mc, Sophie, especially seeing that her day job is saving the other harem guys from death by flower sadness, being possibly eaten or killed by Yan ghost mom and being forced to be married their power-hungry dad,
He mainly wants to separate Sophie from the guys because they're getting her in harm's way, the reason he's like this is because, Sophie saved him from getting hit by a car, falling off a bridge and getting attacked by ghost hands,
So I'm wondering how to balance his yandere side, where he wants the other boy to go away and see them as pests while still being childhood friends and actively trying to remove with the cat arc rolls around with them and keeping healthy well for a yandere, which I know is ironic considering the name