Do girls ever friend zone guys they like?

I've been getting a lot of mixed messages lately from a girl I'm interested in. Some behaviours suggest she likes me, some behaviours suggest she doesn't. We've hooked up before, but just once. She's said on two occasions that we're just friends and she doesn't want to lead me on, but my friends seem to think she's just protecting herself at this point because she's been hurt before. I'm doubtful of that though.
Do girls ever friend zone guys they like?
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