Bloodlust (Vampire Beach)

Here is the official description of the book:

Jason Freeman is stoked when his family relocates to exclusive DeVere Heights, Malibu. The in-crowd at his posh new high school is surprisingly friendly -- soon Jason's hitting all the best parties. He even meets the token hot-but-unattainable girl.

Determined to enjoy his almost postcard-perfect new life, Jason tries hard to ignore the many strange things going down in DeVere Heights. But then a girl washes up dead the morning after one off-the-hook party -- and with no explanation but a suspicious-looking bite mark. Now Jason has to admit that what you don't want to know can hurt you.