when u discover the one you love is a vampire and he is betrothed to u and it is between loving him or leaving him for another???

WANTING TO BELIEVE BUT NOT HAVING THE STRENGTH TO TAKE IT BACK!

This is a story about a girl with a bright future has it all get changed by a man she will later fall in love with!!!

When you discover the one you love is a vampire Prince and he is betrothed to you and it is between loving him and giving him blood for his health or your family's safety from being hunted down by other vampires?