Recluse

Recluse–

Hermit,

Loner,

Outsider,

Solitary

Lone wolf,

Isolated,

Separate;

Detached??

Disconnected??

Aloof,

Uninvolved??

Disinterested??

Impassive,

Removed,

Cut off,

Introverted?

Friendless?

I think none of these–

Self-sufficient!!