It could be both or it could be neither. She may very well just think you are pretty or she might just be jealous. It all depends on how she said it for you to truly know what she meant.
i think its the same
'pretty girl' is in Dutch 'mooie meid' or 'knappe meid'
Magandang babae or simply maganda.
I think that it is "Usted es una muchacha bonita".