Norah McClintock 
At the Edge [PDF ebook] 

Robyn just wants to spend time with her boyfriend, Nick, but he’s always busy-with work, with school, or with Danny, a girl from his past who could pass for a supermodel. Robyn’s friend Morgan thinks James Derrick, a hot new transfer student, could take Nick off her mind. But James has problems of his own. He’s haunted by a tragedy and holding back secrets. When Robyn realizes she and James share a hidden connection, she starts to dig deeper. But is she digging her own grave?