Carnival's Promise

Mia Broadway goes to the carnival with her younger sister's friends. They weren't many but it was at least better than going alone. None of her friends were able to join her that day, but she didn't mind. They all had their reasons as to why they couldn't go. However, there was one person she was hoping to hear from.
Her old friend.
When she never got a response, she dismissed it. They hadn't really talked to one another in a while. In fact, it was most probably nearly a year since they had a normal conversation.
Pobably shortly after the last time they went to the carnival together.
Shortly after they had promised to go back together.
So why was her friend at the carnival without her?

This is a G×G book so if ya don't like, don't read. I would most definitely not like to deal with hate. Thank you~