isolation
/ˌaɪsəlˈeɪʃən/ noun
SEPARATE [U] › the state of being separate from other people, places, or things: the country's economic isolation from the rest of the world in isolation › alone, or separately from other people, places, or things: These poems cannot be considered in isolation.
LONELY [U] › a feeling of being lonely: I had this awful sense of isolation.