I used pick up line at mall, was she making fun of me?

I went up to a girl today at the mall and said,” i hope you know cpr, cause you took my breath away”, she started laughing real hard and her friends laughed real hard and i thought they were making fun of me. Since i thought they were laughing at me I walked away. Then when i walked on the escalator i saw her from far away and her face was red
I used pick up line at mall, was she making fun of me?
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