Let Them Eat Cake

Lilya Staten was Roman to her core. Her family's lineage deeply entwined with Rome's history, the blood coursing through her veins, her upbringing, her training, her position, all to make her a symbol of Roman perfection. But when her best friend goes missing, her life is uprooted.
Lilya Staten befriends a mischievous boy who finds himself in a foreign camp with no memory,. He was the opposite of a Roman, reckless, impulsive, and full of defiance. Together they venture on a quest, forging a close bond that usually takes years to form.

Or

Two boys are in love with the same girl, and she has no clue.