Fire Light (Trinity of Mind) (Volume 1)

Jake is a jeek--part jock, part geek--who finds out he's an unwitting target of genocide against a secret society known as the Druids--a society he didn't even know he belonged to.
O'Brien, one of the last druids, is his mentor. Unfortunately, he is a dud when it comes to magic, but he is ex-military.

As for picking his girlfriend . . . well, that's a split decision. Alexis and Kendra are opposites in almost every way.

If he can just survive the nightwalker, an obsidian-skinned creature with a thirst for blood, an elongated zombie-like body, and a banshee's mind destroying scream, who wears a cloak black enough to make the grim reaper jealous, then he might have a chance.

Ultimately, protecting his loved ones, and himself if possible, becomes his priority.