Dreaming of being alone in the dark is a bad omen as per dream meaning and interpretation. The dream means loneliness and abandonment. You should learn to be flexible and adaptive to avoid serious life situation in near future.
Dream of being alone in the dark and you are scared and crying means you will find yourself being betrayed or abandoned. You might face a serious problem in life and you might not get help from the sources you had expected. The dream also means you might end up in places that you never liked to be.
Dreaming of being alone in the dark and you are happy means you will find spiritual happiness. You will understand more about life and its mysteries.