How can you tell if girl is playing hard to get?

I have this friend how is in a relationship but we are very close. We spend most of I'll time together. She said she want us continue to be together but not intimately. But she does not mind me talking initmately with her. She states that we can hangout but not inimacy. Is she playing hard to get or using me?How can you tell if girl is playing hard to get?
I think she just wants to be your friend and doesn't want to hurt your feelings.