What does it mean when he finds this other girl really cute even if I am his girlfriend?

so he was talking to his friend about how he finds this one girl really cute and that he was overwhelmed by her cuteness. he says he would date her if I wasn't his girlfriend. he didn't say this to me, the dating one but definitely said that the girl was cute.
what does it mean?
guys, please help
What does it mean when he finds this other girl really cute even if I am his girlfriend?
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