The Thirteen Rules - (SIS Series #2) Move On

A girl can't move on from his ex-boyfriend who broke her heart so bad. Her boyfriend ditched her and she was replaced with her schoolmate. She can't move on because she still loves his boyfriend. But one day, she received a message from an anonymous number. She doesn't know who is the sender but the message says "If you find happiness, open your eyes to see it." She follows the message. The sender always sends advice for her to follow. She will move on from her ex-boyfriend? Or she will endure the pain forever?