Girls, What does it mean when a girl starts a conversation with me?

She started a conversation with me about what is my go to sandwich. As she and I started chatting for quite a while I noticed she was playing with her hair. In this case it was her ponytail. There was multiple occasions today she was standing close to me and her foot pointing towards me.

She is still somewhat quiet towards me but she makes little conversation with me. What is going on?

Girls, What does it mean when a girl starts a conversation with me?
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