It's like an actual novel. Dialogue is realistic, characters are believable, but there's one big problem. It's Ben. At the end, he probably has the same shortcoming he started out with. I can imagine a sequel which ends identically, because he never gets it. His girlfriend explains that she stayed with him because she felt a lot of sympathy for him. We needed to have some of that sympathy. We need it to understand why she stayed with him, and we need it because, reading to the end, we're staying with him longer than we'd like to. Watching his loss isn't sufficient to reward us for reading to the end, because he'll never understand what's wrong despite Miko's spelling it out for him in explicit detail. It feels like it ended too soon, and yet never soon enough.