Signs

Hey how do you tell a guy or guys that you’re into him/them when you’re in public. I come across that situation more than a few times.. I’m too shy to come up to him/them that I’d like for you to take me and use me.. I try to unbutton my blouse or top.. and show some cleavage. I know guys like that. But maybe because I’m Asian they don’t pay attention to me. Hey guys comment and give me some suggestions?