Man falls for best friend’s sister

DEAR HARRIETTE: My best friend and I have been practically brothers for the past 15 years. Being that close, I have spent a lot of time with his family (and vice versa), and in that time, his sister and I have grown fond of each other. We text sometimes and talk about activities and places we should explore together, but out of respect for my best friend, her older brother, I’ve avoided taking the leap into romance. We flirt when we’re around each other but try our best — at least I do — to keep it to a minimum.