On a lightly breezy afternoon, Carlos Shihady and Maram Shehada stood together at the Point Reyes Lighthouse, where the rocky land juts a finger out into the Pacific, and watched “Carlos ❤️ Maram 12 17 2022” appear in the sky. The social media element “has made this highly symbiotic,” he said, “and there’s a certain kind of elegance and prominence …