How do I know if her flirting is fake?

Got in touch with a girl yesterday through friends. This is really weird. Like a couple a minutes in, she gives me really strange pet names. Handsome, good-looking, even calling me her prince. She's a gorgeous girl, but for some reason I'm really confused and kinda put off by this. Or maybe im over complicating things I'm unsure.
Nonetheless, she talks about how cute I am to her, and saying things like 'F the other girls, I'd make you mine in a minute'.
In my head I'm like 'This is too good to be true'.
Can some of you help me out here? Especially you girls.

thanks
-Cali
How do I know if her flirting is fake?
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