Right, a friend of a friend went on a handful of dates with a guy once and felt like something wasn’t adding up. She found him on FB. That’s how she learned he was married. He’d cropped his wife out of photos he was using on online dating sites. I realize this situation is not that and IDK what tg and dc are (it doesn’t sound like online dating, but your relationship was flirtatious notwithstanding), but shady people sometimes use the internet to hold themselves out as someone they are not.