Book, In Another Life Maybe - by Taylor Jenkins Reid

Hannah Martin is almost 30 years old and still hasn't found her place in the world. She has lived in Boston, Washington, Portland, Seattle, Austin, New York and is now back in Los Angeles. And he thinks that it is in his hometown, close to Gabby, his best friend, that he will be able to overcome a huge disappointment in love and, finally, get his life back on track. To celebrate the change, there's nothing better than gathering old friends in a bar. And it is there that Hannah meets Ethan, her ex-boyfriend from her teenage years. At the end of the night, both he and Gabby offer him a ride. Is it better to leave with your friend? Or stay late with Ethan and enjoy the rest of the night? Life is made of choices... the question is whether Hannah's choice will be able to change her destiny.