Broken angel

It's about girl that became angel

Once upon a time there was a girl, let's call her Rea, that fell in love with boy, a boy that didn't know about her. She loved him more than anyone on this planet. She'd give anything for him, even her life. There comes the day when boy meets a girl, but not Rea, the other one, the one that is prettier and richer than Rea. Slowly boy starts falling in love with her, but when Rea found out, her whole life changed, she wasn't the same girl. Even though her heart was broken, she became stronger, she was ready for anything now.
After a while Rea decided to visit the town that boy lived in. With hope that she will find him and he will fall in love with her she happily entered the town and found him, but when she saw that there is another girl next to him, hugging and kissing him, she wanted to kill her, but when she saw how happy he was, she turned around and ran away in tears. Years later people around the town started telling stories about some girl that loved a boy, but he broke her heart. They're saying they can hear her singing in tears on top of the buildings. 
"When it's full moon, if you look at it you might see her with her wings wide open, like an angel, singing some song". They didn't know what was name of the song so they called it "Broken angel".