And be one traveler, long I stood
And looked down as far as one could
To where it bent in the undergrowth;
Christine thought about the Phantom, formerly known as the Angel of Music. She thought about what would happen if she lived with him. To live with the Phantom would mean to never see the sun again or her friends. On the other hand, there was hopefully music to nourish the soul.
If she were to return without Raoul, she would possibly never find a lover again. She would have to live with the guilt that it is because of her that Raoul died. Still, she could live life normally with her best friend, Meg. Maybe she would become the new Prima Donna if she kept on singing! It would be great but for the burden of the death of her childhood friend.