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How to make girls crazy for you
Let her see you having a good time.
There's nothing a girl wants more than a guy who is obviously enjoying himself and completely happy on his own. When you're with your friends, enjoy laughing and sharing stories.
When you're walking to class, think happy thoughts that put a smile on your face. When you see her, show her that you're in a good mood, and that you're not a total downer.