Facebook is channeling its earliest days as a hot or not website for college students with a new feature called Secret Crush. To be announced today at the social network’s annual F8 developer conference, Secret Crush will allow Facebook Dating users to select up to nine friends they want to express interest in. Think of it like matching on Tinder or Bumble, except you get to hand-pick the specific friends you want to date ahead of time, instead of hoping their profiles show up in the queue.