Creatus (Creatus #1)

another edition using this ASIN can be found here

After years of searching for the mysterious stranger who saved her life, twenty-two-year-old Kristina is alone and desperate. Seeing no future in her worthless existence, she attempts to force her protector out of the shadows the only way she knows--killing herself.

Ignoring his family's disapproval, Derrick continues to safeguard the girl he rescued from a vicious attack years earlier. The one thing he can't protect her from, however, is herself. When Kristina jumps off a bridge, he must reveal himself, even if saving her means she will now be in danger from his kind.

To make things worse, a video revealing Derrick's supernatural ability when he saved Kristina is now in the possession of a government agency, and someone in his family will do anything to keep their existence a secret, even kill Kristina, the woman Derrick can no longer live without.