Why she touch me but when I touch her she says don t touch me?

She is a friend she touch my arm my back, my lower back, my shoulder, my thigh and she walk and sitt too close but once I touch her lower back she syas din't touch me she says it with a simle and with a cute voiceand I fell that she dont want me to touch her what does that mean
Why she touch me but when I touch her she says don t touch me?
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