There is no definite answer to this question as it is up to interpretation. Some people may say that she left because she felt like she was not belonging or that she was not being accepted. Others may say that she was unhappy with the way things were going in her life and wanted to move on. There may be other reasons as well. Ultimately, it is up to the person who is asking to what extent her departure was due to external factors and to what extent it was due to internal factors.