How can I show him I'm different than the other girls?

There's a cute boy at my job and I think he flirts with a lot of the girls there.. but I'm a lot different than the average girl, I'm really witty and weird and individual. I just don't know how to give him something to chase, while talking to him, and trying to catch his attention? I'm also a bit shy with guys I'm into so what can I do to show him I'm not just another teeny bopper for him to flirt with for fun?
How can I show him I'm different than the other girls?
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