Steal something of hers and then return it!
I see the problem it is quite complicated to make the first move... is there any way so you can arrange it so you bump into each other...
You happen to start walking to the shop as she's walking down the road... you catch up to her and ask if she minds you walking with her...
Your both young teenagers... i can't think of much else outside of a movie... ask her to go to the local arcade with you... win her a nice teddy lots of oppurtunity to talk and joke...
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