How can I make him see I'm not just one of the guys?

I've always been a tomboy its the way I was raised. But I'm really interested in this guy. I've tried wearing daisy dukes and tight tight shirt, I've even went skinny dipping whit him but its like he doesn't notice me...So what I'm asking is how can I show him I'm interested in him and want to have a little fun with out him thinking I'm one of the guys?
How can I make him see I'm not just one of the guys?
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