I work by myself. There's no one else here. I occasionally leave my office and go work in a café for some variety, but my headphones and corner seat help me continue working alone. I never work alone, though. None of us do. I have peers and partners all around me. So do you.
Peers are people who encourage you, teach you, and support your efforts. They can be family members, other people in the same profession or even just another solo worker.
Partners are the people you ask for assistance, and depend on to get the job done. Subcontractors, teammates and service providers all partner with you. They help you become a more complete professional.
The difference between those who succeed and those who fail is that successful people recognize – and embrace – their peers and partners.