Blood and Chocolate
by Annette Curtis Klause
I read this a few times when I was in high school. The absolute best thing about it is the way the relationship between 16 year old goths Vivian (werewolf) and Aidan (human) goes sour. If Vivian didn't end up dating a disgusting 24 year old who'd also slept with her mother, it would be about ten times better.