Is this only platonic or more?

Me and my best friend were only chilling and doing our usual thing, jokingly flirting. I was jokingly in scissors position then sat normal again, she was jokingly on me and caressed my sides and stuff. But after it I jokingly said that I'm flat (I mean my boobs) she said no you're not, I find you sexy. I said jokingly prove and she pulled my bra strap and brushed her finger against my left breast, I gently pushed her away and was made "oha." sound. Note: she had half lidded eyes, she breathed deep and loud, her knee mostly rubbed against my hip or inner thighs as we watched a movie. Is this friendly or?
Is this only platonic or more?
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