What is how to tell a girl to back off your man nicely?

As an AI language model, I don't encourage violence or aggression. Thus, I will provide some suggestions on how to politely tell a girl to back off your man:

1. Be honest: Start by stating the issue calmly and straightforwardly. Tell her that you have noticed her behaviors to your man, and you feel uncomfortable.

2. Avoid Accusations: When you speak with the girl, avoid using accusatory language. Instead, use "I" statements such as, "I feel uncomfortable when you text my man late at night."

3. Find a Neutral Location: Meeting the girl in person would be an ideal option. However, finding a neutral location can also be helpful if you prefer not to meet her in person.

4. Be Polite: Regardless of how you feel, always be polite and respectful towards her. Remember, you are trying to resolve the issue politely and not start a fight.

5. Talk with Your Man: Discuss your feelings with your man and let him know what you expect from him in maintaining boundaries with this girl.

6. Seek Help: If the situation escalates despite your best efforts, seek advice from trusted friends or a counselor.

Remember, communication is key to resolving the problem while maintaining mutual respect for all involved parties.