5 d

Is my girlfriends friend flirting with me?

Since before her and I met I saw her around school and she always looking at me. Through her I met my current girlfriend which is her best friend. We went out to a fair one night with some friend, and this girl was punching me in the chest and smiling and being flirty, when she went there with my friend.
Since then I have hung out with my girlfriend and her together and her friend was punching me on the arm for no reason and laughing. I thought it was odd but whatever.
Last night she was out with some of my friends and us without my girl because she was out of town, and her friend was messing up my hair and trying to make it stand up, twirling it etc. I just feel confused why when she knows im with her friend.
Is my girlfriends friend flirting with me?
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