He might just not have noticed

In studies at the University of Kansas, people were asked to tell whether the person they were talking to was flirting with them. They picked up on flirting less than half the time, especially when it was subtle. You laughed at his jokes three times and asked about his weekend, and he decided you're just a friendly person. That's not a rejection, it's a signal that didn't get through.

The volume scale: five notches

  1. Showing I like himSmiling, paying attention, laughing at his jokes. The quietest level, and it often gets mistaken for politeness.
  2. PlayingTeasing, joking arguments, a light challenge. "Bet you can't tell a cappuccino from a latte."
  3. Getting interested in him personallyQuestions not about work but about him: dreams, fears, funny stories. You remember the details and bring them back up.
  4. Hinting at more