Dude looks like an imbecile and Lolita a bitch. Zero innocence and romanticism. That's why one should always read the original novel first to avoid lousy film adaption.
Certainly a micro-story to tell but I'm not sure if the film was aiming at something bigger but missed. The ambiguity is key and what makes the story shine: is it a person behind everything or the spirit of a person? Do ghosts send text messages now?