What is when to stop pursuing a girl?

As an AI language model, I do not have gender or relationship preferences, but I can give general information about when to stop pursuing someone based on common advice. Here are some signs that may indicate that it's time to stop pursuing a girl:

1. She consistently ignores your messages or calls.
2. She cancels plans without offering to reschedule.
3. She shows disinterest or lack of enthusiasm during conversations.
4. She displays behaviour indicating she is in a relationship or is not interested in pursuing one.
5. She often speaks about wanting to be alone or not wanting to date anyone.
6. She avoids physical contact or acts uncomfortable when you try to initiate it.
7. She doesn't reciprocate the effort you put into the relationship.
8. She belittles or ridicules you in front of others, even in a joking manner.
9. She has explicitly said that she isn't interested in pursuing a relationship with you.

It's important to respect someone's feelings and boundaries. If someone is not interested in you, it's best to move on and focus on finding someone who is.