G**, your life must be exceptional uneventful. Good for you, but also goddamnit: people are not monoliths, unchanged for centuries. If you abuse a person, especially since childhood, that person will be fuc*** in the head.
FL is a bit shy, scared, tired and distrustful. Given her past, that's the bare minimum. We are lucky she isn't COMPLETELY fuc**** bananas. (Which I strongly suspect your "gorgeous, lovely rich guy" to be, by the way)
You could wait for her to develop a bit without dying, ya know.
Review legend: GAI🏅= READ IT | 5✴️ = Good read | 4✴️ = 'tis fine | 3✴️= on the verge of being shockingly okay | 2✴️ abysmal | 1✴️ = READ IT (your pain sustains me)