Unchipped: Kaarina by Taya DeVere

In the two years since the Great Affliction, the Happiness-Program has transformed a civilization on the brink of extinction into an organized, beautiful, and happy society. However, for the Unchipped–those whose chips can’t connect to the system–living a comfortable life remains out of reach.
Kaarina, one of the Unchipped, would give anything to live inside the walls of the city again. Haunted by her mother’s suicide and alone except for Bill, another Unchipped thousands of miles away whose thoughts are inexplicably linked to hers, Kaarina fights for survival. But when her horse’s illness drives her into the city to find medicine, she becomes acquainted with a Chipped man who makes her question everything.
Now a new fix to the system promises her the chance to finally be normal… just as she begins to learn life in the perfectly augmented reality may not be all that she imagined.