Well try and catch her when they aren't around. If you see a quick moment, run up and say hi remember me? I never got to properly introduce myself. And go from there. If you can't get her when she's not with her friends then walk up to her and ask to speak to her for a moment and most likely she walk away from them for a second to see what you have to say.

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If you can't handle the thorns, don't crave the rose!!