Mermaid’s Heart by Stacy Claflin

What’s the point of being a princess if the whole kingdom hates you?
Being a royal should make my life easier, but it only compounds my problems. When my father, the new King of Valora, succeeded the beloved King Tiberius, many of his subjects believed he killed my uncle just to gain the throne. His new policies only make the people hate him more.
Just my luck, they transfer their loathing onto me.
Even my best friend and my boyfriend aren’t enough of a buffer, and I’m continually fending off verbal, and sometimes physical, attacks.
That’s when my powers start growing…
When no one at the academy can—or will—help me learn about my new abilities, I begin to research them on my own. Modern answers seem to be entwined with a terrifying ancient legend.
If the lore is true, my destiny is far more tragic than my present problems. And I don’t know if I can change it.
Or if I should even try.