DEAR MISS MANNERS: All I see on social media lately are photos of awesomeness: beautiful meals, precocious kids, exciting outdoorsy vacations with ecstatic partners. Though I’m very fortunate in a lot of ways, I’m lonely. I think it’s tacky to post nonstop photos of perfect-adorable-awesomeness during a pandemic. Do you agree, or do you think I’m just bitter and jealous? But suppose it is all true, and many people are thriving in these times -- leading glorious lives despite the pandemic.