Help

so I was reading this one but forgot to save and title.
So the Fl is very rich (historical setting) has blond here and pink/blue eyes, Art is veryyy pretty.
She has a very good luck in money and all, but bad luck in Love, her bf cheats her, and to avoid engagement, she dates a Heir of duke (the duke is actually a pushover but looks scary (actually he is handsome)) has black/blue hair, i forgot eye colour,
Fl family is very wholesome, her brother adores her, Ml's family and mother is problematic,
so please help