Are you a teenage girl? Or perhaps you simply have the taste in movies of one (Twilight, The Fault In Our Stars, Before I Fall)? If so, you can confidently add this movie to your lineup. For everyone else: keep moving.

It ain’t bad, it’s just not that good. It’s about a young woman, Maddy (Amandla Stenberg), who has SCID, a disease that basically renders her immune system void. She has to stay in her sterile home just to stay alive. She has never left it. It’s a sad and sheltered existence without outside contact except for her mother and her nurse, Carla, and what she can observe from her window. When a cute boy (Olly, Nick Robinson) moves in next door, it widens her world by a tiny margin, but only makes her feel more keenly for what she’s missing.

Their love story unfolds slowly, as it must when one person is physically removed from the other. In the novel they communicate by text or instant messaging. To make that play a little less boring on screen, director Stella Meghie imagines them within the architectural models that Maddy’s always working on. It’s a device that works while still reminding us that these conversations don’t actually take place in a face-to-face reality. Still, it’s a talk-heavy, plot-light movie that doesn’t move around too much. If you aren’t swooning over Olly’s too-long-locks, you’re probably going to find this long.

As you might guess, this relationship prompts Maddy to consider going outside for the first time in her life. She’ll be risking her tenuous health and the sharp disapproval of her overprotective mother. But what else is young love for, if not rebellion?

Anyway. As you know, Hollywood only thinks teenagers are good for two things: romance with vampires, and death. Or at least they’re only profitable doing one of those two things. Amandla Stenberg is very charming as Maddy, the brave, beautiful, but socially awkward girl next door trapped in a glass castle. She succumbs to the kind of romantic gestures no teenage boy would be caught doing and only a young-adult novelist could dream up. There’s some major eye-rolling to be had in this movie, and it starts rather early, when Olly first appears in his driveway, tossing his luscious locks in the unfiltered sunlight, shooting his pretty neighbour a cocksure grin while showing off on his skateboard. I was so sure he was about to eat it, and truthfully hoping he would, that it set a really weird tone to the movie for me. I guess my lusty teenage days are too far behind me. Your enjoyment of this movie will depend on the calculation between yourself and your own misspent youth.