My Brother’s Best Friend (A Swedish Love Story).

Liv is Thomas’s best friend’s little sister, so off limits the limit isn’t even allowed to exist in the first place, yet his feelings for her are getting increasingly non-platonic. Despite this shameful obsession, he’s determined to keep his secret forever and never ever act on his desires, reveal the smallest glimpse of attraction. But…
When a devastating and life-altering event is thrown Liv’s way, she finds herself needing Thomas in her life more than ever, needing him in a different, very different way than before. Notwithstanding the miscommunication, jealousy and guilt, the lines become blurred and things start to spiral. Their each respective mental trauma manages to bind them closer together and makes them realise love might not have to be conventional or pure in the traditional sense.