Endgame by Aisha Tritle

When Leigh, a young and successful lawyer, is left by her boyfriend of two years for an Instagram model, she enters into a daily cycle of excessive alcohol and first dates in a virtual reality dating app called "The Game".

Then she meets the enigmatic Alexei and it’s different. He’s beautiful, just her type, and into her. But when Leigh is trapped in The Game during a Gatsby-themed gala and forced to catch a hacker who’s using the app to set up crimes in the real world, she realizes there's a far more dangerous game being played…

And Alexei might be the death of her.