It Ends With Us by Colleen Hoover

The story centers around the main character, Lily, and her relationships with two men, Ryle and Atlas.

Lily is a successful businesswoman who is trying to move on from her past, but her past comes back to haunt her in the form of Atlas, her first love. Atlas is a talented musician and the two reconnect, rekindling their old flame. As they start to build a life together, Lily realizes that Atlas is not the man she thought he was and that he struggles with anger issues.
As the novel progresses, Lily is forced to confront her past and the choices she has made, and comes to realize that love can be complicated and that sometimes it can hurt the people you care about the most. She must decide whether to stay with Atlas, despite his flaws, or to walk away and try to build a new life with Ryle.
It Ends With Us is a novel that deals with themes of love, betrayal, and forgiveness. It is a thought-provoking and emotional story that will resonate with readers who have experienced complicated relationships in their own lives.
Hoover's writing is praised for its honesty, raw emotion and its ability to evoke a wide range of feelings. The novel is praised for its exploration of the dynamics of domestic violence and the way it can impact a person's life. The book is considered a must-read for anyone who wants to understand the complexities of relationships and the power of forgiveness.
As Lily navigates her relationship with Atlas, she also has to deal with her complicated past with Ryle, a neurosurgeon who was once her best friend. Ryle is the complete opposite of Atlas, he is kind and supportive, but Lily can't shake off the feeling of betrayal that she felt when he left her alone during a difficult time in her life.