I don't want contact with this girl anymore
Do you not want to contact her because she asked for money?
I see that as a clear sign that she's just with me for what she can get.
If you are sure that a girl is with you just for what you can give her, it is a good idea to break off contact with her. It is important to find someone who loves you for who you are, not what you can give her.
Even though she asked me for money, I don't know if she is with me only for money. I need to think about it.
It is fine to take some time. It is a big decision to make whether to cut someone off so it is important to make the best decision possible.