No rating because my reaction is... complicated. 
 I've never read Sarah Dessen before, and I'm impressed with so much of this book. I like that what seems like the focus of the book at first--Caitlin's sister's disappearance--takes a backseat to her new relationship with Rogerson. I really like how realistically the abusive threads creep into the story--slowly cutting her off from her friends and family, his jealousy of anyone else she talks to--and how Caitlin accepts all of it without seeming like a weak Plot Point of a character. When the emotional abuse turns physical, the reader isn't at all surprised, and Caitlin's reactions seem very authentic. 
 But there are bits in the physical violence and its depiction that seem heavy-handed: the early scene in which Rogerson's dad hits him, Rogerson's claim of "you made me hit you because you were late" (not a direct quote)--there's not much subtlety there. I'd have almost preferred to not see the scene with his dad, and leave it a mystery of where he came by his abusive nature--showing that one interaction sets up a strong undercurrent of "he's like this because his father is like this" instead of "some people are just assholes on their own terms." 
 I think I'd also have preferred if this had remained at the level of emotional abuse, not just because it would remove the distasteful violence from my sunshine-and-lollipops existence: it's easy for physical abuse to escalate until someone notices (in this case, Rogerson beating Caitlin in her front yard), but it can be so much harder to spot--and extract someone from--emotional abuse. I remember being a teenage girl and wanting so much to be everything my boyfriend wanted me to be, including available all the time and interactive with nobody else but him. All those in Caitlin rang very true to me, and I think it's probably more common in teen relationships (and, frankly, adult relationships, too) than we adults want to think, so I would have liked to have seen this book stick with just that kind of "murky" abuse--the kind of abuse that's easy to identify once you're an adult and can read those checklists over and over and recognize your teenage self, but doesn't seem abusive at all as a teenager. After all, how can it be abuse if you're not being hit? 
 As I said, my reactions are complicated. I think it's an excellent book, very well done; that doesn't mean I didn't want more from it.