Who do you think would fit the part of Dexter in This Lullaby?

If they made a movie based on Sarah Dessen's novel "This Lullaby", who would you like to play the part of Dexter Jones? Any other characters?
Who do you think would fit the part of Dexter in This Lullaby?
The guy from entourage before the show when he did that really bad movie with melissa joan hart drive me crazy? would be perfect or the younger brother from supernatural Sam