SOLVED. YA fiction. White cover with cherries on it, main character is a runner who has a boyfriend and two best friends. [s]

[Alice]

One of the friends' names is Pinky. The main character meets a girl at the gym and the two become closer and she strays from her friends and breaks up with her boyfriend. Eventually, she falls in love with the Gym Girl and makes up with her other friends

[Marisa]

Of All the Stupid Things fits a lot of your details

[Alice]

Marisa wrote: "Of All the Stupid Things fits a lot of your details"

Alice wrote: "One of the friends' names is Pinky. The main character meets a girl at the gym and the two become closer and she strays from her friends and breaks up with her boyfriend. Eventually, she falls in l..."

Yes that's it thank you!