I think it means she fell in love with this guy and she was sure he was feeling the same and it was divine and the real thing. Then he broke her heart and she has a heart of glass because she opened up her heart to him and became so vulnerable that her heart broke so easily like glass. Now she finds love confusing and can't trust her feelings or the guy. That's what I get out of this song because this same thing is happening to me right now. Guys can be so misleading about their feelings and intentions.
I think it means she fell in love with this guy and she was sure he was feeling the same and it was divine and the real thing. Then he broke her heart and she has a heart of glass because she opened up her heart to him and became so vulnerable that her heart broke so easily like glass. Now she finds love confusing and can't trust her feelings or the guy. That's what I get out of this song because this same thing is happening to me right now. Guys can be so misleading about their feelings and intentions.