Gender doesn't have anything to do with this kind of behavior.
It is possible na hindi siya sanay na nakakatanggap ng affection, iba-iba tayo ng environment na pinagmulan.
May term na breadcrumbing which is usually ginagawa ng mga taong nagpapasakay lang, to keep a lot of beneficial people close.
Communicate na lang rin, be clear with your intention and ask her para malinaw ang status niyo.