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.
Mokupuni O wahine
'Nani' is the Hawaiian word for pretty.
'oe Nani, maika'i 'u'i, nohea
Aloha: ʻĪlio u'i [I-lee-oh oo ee]