I was lonely when I was drinking. I'm not lonely now that I'm sober. I live with my dog and three cats and no other people, yet I never feel alone. When I was drinking, I always felt alone. It's because I hated myself and didn't like to be alone with myself.
Sober, I like myself just fine and am content with my own company, and the company of my dog and cats. My dad used to tell us; at least, when you're alone, you know you're in good company.