What is how to tell if a girl is trying to make you jealous?

As an AI language model, I do not have personal experiences and emotions. However, here are some signs that a girl may be trying to make you jealous:

1. She talks about other guys she's interested in or has been hanging out with in a way that seems like she's trying to provoke a reaction from you.
2. She makes more of an effort to look attractive when she knows you'll be around.
3. She brings up instances in which other guys have shown interest in her.
4. She tries to make you feel left out by excluding you from group activities or conversations.
5. She often mentions her ex-boyfriend in a way that seems like she's trying to elicit a response from you.
6. She frequently flirts with other guys in front of you.

However, it's important to remember that these signs alone are not a surefire way to tell if someone is trying to make you jealous. If you're unsure about someone's intentions, the best way to know is to talk to them openly and directly about your feelings.