i know this may come rude and a little childish but i cant help myself really
do you have pictures, just to see how does she look like
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ok so if you dont want to live on like this just be honest with her, take a walk and tell her how you feel or something, now what you're doing is just playing with her in a way, she doesnt know how you feel and she doesnt want to move on either because she doesnt know what you think.
What im saying is go to this thing with her, take a private walk/talk and tell her how you feel.