That Summer With Me by Julie Prestsater

Melody and Jordan had the kind of young love you read about in books and see in swoon-worthy movies over a tub of popcorn and a giant soda with two straws. When they said goodbye at the airport twenty years ago, they pledged their love to each other and made promises of forever. A forever that never came.
Melody Valdez had two ride or dies: her mom and her daughter. She didn’t need anything else or anyone else in her life. Her world was nearly perfect until Mama Annie was diagnosed with cancer. Now, what she needed was a miracle.
Jordan Aria was in a monogamous relationship with his work. And he couldn’t care less it wasn’t something he could snuggle up to every night. He had spent his entire life dedicating the time needed to become the world-renowned doctor that he was. So why was everyone trying to set him up?
When Melody takes Mama Annie to her first oncology appointment, she may just find the miracle she was looking for. For her mom and herself.