So if a girl doesn’t obviously flirt with you she only sees you as a friend?
Yes. You just can't assume that she sees you as a potential partner unless she gives you specific hints or tells you directly.
So if you’re friends and she likes you she’ll always be obvious about it?
Yes she will be obvious.
How obvious? As in touching you, kissing you etc?
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Shy girls might not do this stuff even if they’re close friends though.
I agree. Can communication cause awkwardness though?
Play a game. 5 minutes. Take a paper. Smoothly ask 4-5 questions and add this too in it. Ask her to write back to you. And tell her that you both shall forget about this after the game. Obliviate!