a person who by desire lives alone
A person who desires to live alone is often referred to as a "solitary" or a "recluse."
A person who desires to live alone can be called a recluse or a solitary individual.
Hermit!
Troglodyte
recluse
A person who is withdrawn from society and lives alone is often referred to as a hermit or a recluse.
A Hermit.
People can survive alone by keeping a positive outlook. As long as a person has the necessities and lives a good life, it will not matter if they are alone.
No person lives much past 100 let alone a 1000 years. Noah was supposed to have lived to 600 years.
Somebody dresses them.
If the person completely isolates himself from society, he typically is called a hermit. He can also be referred to as a recluse.