Q. Well, I’m a teen. Nearly an adult, but still a teen, and my best friend is in a relationship with my guy best friend. They’ve been together for nearly a year, and I’ve known them both for years.

Flirting with a friend isn’t the same as flirting with a date or a stranger—it’s more nuanced and definitely riskier. You’re not just testing the waters; you’re wading into familiar territory with ...

How good are you at flirting? Can you catch a person’s eye and use the moment to generate his or her interest? Do you have friends who flirt with ease and clear success, but struggle yourself to say ...