Is teasing a girl flirting?

The first thing to look at is what she does with the joke. If she extends it, adds her own angle, or teases you back with a new example, she is treating it as flirting or at least as fun. If she answers the literal point and drops the tone, she is probably being friendly and not reading it as anything more. A single laugh reaction tells you very little. Two or three exchanges where the tone stays playful tell you a lot more.

Pay attention to specificity too. If she brings up something you said earlier in the conversation, that is a sign she is paying attention to you, not just to the topic. People who are flirting usually keep track of the other person's details. People who are being polite usually respond to the most recent message only. Her reply length can help as well. A longer, livelier answer with a question back usually means she is engaged. A one-word answer with no question tends to mean the teasing landed as neutral or slightly off.

A teasing message works best when it is about something you both can see: a debate you are having, a choice she made, a silly detail in what she just said. The safest teasing is aimed at the topic or at a harmless habit she clearly enjoys, because she can disagree without feeling small. Avoid anything that touches her looks, her dating history, her job pressure, or anything else she might feel self-conscious about. If you are not sure whether a jab is safe, pick a different one.

The other test is whether the message leaves her a clear way to reply. A good tease ends in a spot where she can push back, ask why, or fire something back at you. A tease that closes the conversation off, like a statement with no hook, makes her choose between agreeing and dropping it. If you find yourself writing the last word of the exchange, cut it short.

If she plays along, keep the energy but do not escalate every time. Two or three playful exchanges in a row is normal when you are both enjoying it. Sending a tease every hour for a day tends to read as trying too hard, even when she is laughing. Let the conversation move onto something else for a while, a question about her week or a plan, and let the teasing come back naturally later.

If she does not engage with the tease at all, do not send a second tease hoping for a different result. Respond to whatever she did say, warmly, and see whether the conversation finds its own footing. If the next few exchanges are all flat, the teasing is not the thing to fix. Ask her something you are actually curious about, and if she still is not warming up after a few days of normal chat, let the thread fade rather than pushing harder.