Flirting
Flirting is a playful, slightly ambiguous form of communication that signals romantic or sexual interest without stating it outright. It works as a safe way to test interest without risking a direct rejection.
Good flirting is built on paying attention to the other person's response, not on rehearsed lines. Flirting that's exaggerated or one-sided, with no read on the other side, easily tips into unwanted pressure.