Sadly, I feel the pain of a relationship gone bad is the same at any age. It can literally break your heart. All I could offer is just be there for her, as you have done. Her knowing that she is supported and loved at home ( as someone else stated) after discussing this with you, will make it easier for her to come to you with any other relationship issues that she will encounter in the future. A door has indeed been opened between the two of you, and I suspect that her experience, as painful as it as has been, will only strengthen your bond.