I can't tell if a girl is playing games, or I'm being

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I can't tell if a girl is playing games, or I'm being a beta. She comes over often, likes to rip the bong and play board games with me. So im like ok, she is dtf.
So she goes, "oh my back hurts"
And i say "you want a backrub?" She says , no thanks. So later on, shes kinda laying there on my.bed like shes waiting for me to make a move, but then when i kinda lock eyes with her she goes ok, im gonna go. Whats the deal? Am i supposed to leap on her? Everytime we hang it usually ends in a hug, so i know there is something there. Ive asked her what she thinks and she says she isn't sure. Yet when she sees my social media, she asks "oh whos the girl? Are you a thing? " and i catch her looking at my snapchats like minutes after theyre up. Im so confused. I try to get her to stay over and she doesnt want to, and she doesnt respond to innuendo. The fuck is the trick to introverted girls?