It seems like this woman has put you in a very awkward and unfair position. I'd say she was, for whatever reason, trying to keep your attention and affection while she was waiting for her current boyfriend to return.
I think this was more of a control issue than a sincere attempt at reconciliation and becoming a couple again.
Despite what her feelings may have been, I would not suggest continuing contact or communication with her. Think about it, she could play with your heart again and you will have spent all your energy trying to make a relationship work with someone who is unstable emotionally and immature. If you do decide to talk to her again, just be aware of what could happen and how your sincere efforts could be thwarted again.
You did the right thing. The best thing for you now is to try and heal and when you're ready, you will meet someone new who will treat you with the honesty and respect you deserve.
