The Butterfly Tattoo by Philip Pullman
Chris meets Jenny while he's working a party, after she runs away from some guys because they found out she crashed the party. It's love at first sight for Chris and Jenny agrees to meet him again. The two get closer, though Chris loses touch when Jenny's home is raided for drugs and she can't return. At the same time, Chris' boss is having Chris help him fix up a remote cabin. The reason he gives is that there's a bad guy looking for him after he helped put his brother behind bars. Chris isn't sure if it's true but helps him out anyways.
This is a pretty short book and it felt like things just weren't explained enough throughout the novel. There was romance and there was a mafia type story, but they didn't work well together at all for me, which I think was in part due to the fact that the book was so short and there wasn't enough time to make the two themes work with each other. Having read His Dark Materials, I don't feel like this lived up at all to how good that trilogy was. I was pretty disappointed with this one.
First Line: "Chris Marshall met the girl he was going to kill on a warm night in early June, when one of the colleges in Oxford was holding its summer ball."