Flirting

Is she flirting?

She started this interesting behavior around me since like 3 months ago, where she would... I guess playfully punch me in the stomach (and touch my stomach, to which I'm still not sure why she did that to this day) and wanted to see me get mad at her and chase her. She also tried to push me but failed miserably as her feet were sliding and she didn't move me at all. In the beginning most of the girls in my class messaged me calling me cute but I just really liked this girl so much I refused all of the offers. I personally do not have that much experience considering I was introverted and never really had any friends I'm 15 and before my glow up I basically looked like a 12 year old without any features, if someone could help me identify this interesting behavior that would be fantastic. :)
Is she flirting?
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