After what was thought to be a simple case of the flu, 8-year-old Kinsley Sandvik died on Valentine’s Day. (Courtesy Shannon Sandvik) For one family in Calvert County, Maryland, Valentine’s Day will always be connected to heartbreak: the day when they lost their 8-year-old girl. Kinsley Sandvik had a vibrant laugh and, according to her mother, everyone was her friend. “If you met her, you fell in love with her. No one was a stranger to this child, not even the pizza man,” said mom Shannon Sandvik. “I’d say, ‘Don’t talk to strangers,’ and she’d say, ‘I’m not,’ and I’d...