1. Changing circles and changing people: If a girl says changing circles and changing people, she may want to change her social circle, meet new people, and draw a clear line with past figures. This may be because she feels that the people in her circle are not suitable for her, or she wants to seek more opportunities and new experiences.

2. Change your head to lose weight: Changing your head may mean changing your hairstyle, and losing weight means shaping your body through fitness and diet. This may mean that this girl wants to change her image and make herself more confident and healthy.

3. Make money: This may mean that this girl wants to become more independent economically or look for better career development opportunities. She may want to find opportunities to make money in different ways, such as starting a business, investing and so on.

In a word, the meaning of this sentence may vary from person to person and needs specific analysis.