what am i( vampire/hybrid royal story

Marrisa is an average girl at an average high school, with average friends and family or so she thought. What happens when she starts to experiencing changes within herself? On top of it all, her so called betrothed comes to take her away a week before her 18th birthday. She's having trouble trying to understand who and what she is, to add to the drama another guy shows up also claiming to be her betrothed. Who will she chose and will she ever find out what she truly is?