"I must release you for I've given plenty."

My last post I mentioned a girl who's fiance had called things off. This girl has really been on my mind this week and for reasons other than the obvious. I learned that she is still hoping and praying that he will change his mind and come running back to her. She still wears the diamond he gave her even though he hasn't called or done anything to give her validity to this. I am torn about the whole thing. I went through a rough break-up about five years ago and I am trying to go back to that place and give her some advice. But what if my advice is not really what she wants to hear right now.
I remember after my then boyfriend broke up with me telling myself that we could still be friends. He actually wanted that and kind of in my opinion led me around for a whole summer. The truth of the matter was that I was still holding out hope that he would realize during this "friends" stage that he couldn't live without me and would magically run into my arms. This is what really happened: he met another girl, started dating her and I was left with an even bigger broken heart. I remember during that "friends" stage two people giving me excellent advice that I eventually listened to. One being a good friend from college telling me that I was fooling myself by hanging out with him still and still allowing him to have the best of both worlds. She told me to quit seeing him on the weekends and do my own thing, try to establish my own identity without him. My dad also told me that there is no such thing as "friends" when one of you is still in love with the other one. In other words my intentions were clearly to not really be friends.
Eventually I heeded their advice and moved on. It was the worst time of my life but also the best time of my life. I suddenly had all this time to focus on myself and get things right within myself.
So I guess I am confused as to what to say to this girl now because it looks like she is not really letting go. I'm worried for her. One one hand its none of my business and she can do whatever she wants. On another hand I feel like she deserves so much more and want to help her move on with her life. But if thats not what she wants then theres not much I can do. Except pray...