Girl asked me what type of girls I like?

A girl texted me what type of girls I like. I have known her for a bit but she randomly brought this up. I don't know what to say. I mean I like her... she has a boyfriend but previously she told me she was sad because people keep letting her down. So I don't know what to think. Why would she tell me this?
Girl asked me what type of girls I like?
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