Most Helpful Girl
Maybe she wants to be your friend and clear things out, if it ended ugly for you two
Most Helpful Guy
I wouldn't jump to any conclusions yet. What I would try to do is figure out what she has been doing the past year, if she has been seeing anyone and whatnot. Get information like that before coming up with a conclusion. She could be using you as a type of rebound, she could really want to get back with you, she could be currently leading someone on and had enough of said guy's attention. As I said, talk to her first (don't interrogate) before getting a definitive answer for your question.