Shift Your Mindset is a monthly series from CNN’s Mindfulness, But Better team. We talk to experts about how to do things differently to live a better life. CNN  —  Fewer nights out with friends, more take-out meals, less theatergoing. Americans are spending more time alone than ever before. Whether this trend results from an epidemic of loneliness , which leaves people wanting for company, or a century of solitude , in which individuals prioritize solo time, the fact remains that more of us