Personally, I've never experienced loneliness. I enjoy solitude way too much (probably even border on misanthropy, but I try to curb that).
Actually, I felt more isolated, exposed, ashamed, vulnerable and on the verge of losing my mind when I was still an active dub. To be surrounded by nosey, closed-minded, overall dumb, uneducated, fake, insincere, dick-waving, hypocritical, back-stabbing religitard assholes with their conditional love was far more torturous than ever being off on my own.