When Edward left Bella in New Moon, he left her no choice but to get on with her remaining crumbled life. But Bella was so completely shattered over her abandoned heart that she goes into some deep trauma over time. She founds ways to help ease her excruciating pain. She began diverting herself from the heart-throbbing pain and found herself on a new path. She amended herself into something new and sharp so that no one would be able to hurt her, but in the process, she lost herself. She is no longer in control of her emotions, she is something that she didn't know before existed. It will all change inevitably and when it does nobody's to blame, as all will be damned.