Normally if you are flirting playfully and you get the feeling that they are also. Then you are most likely on the right track. Try brushing their hand or arm with yours, to see what response you get. And look into their eyes.
http://www.ehow.com/how_2218622_flirt-girls-shy-guy.htmlI saw this when I was in the middle of a crush (he was shy/quiet etc.)I immediately remembered the many times he had shown the signs but too late! I had messed it up! I hope it helps you to stay away from those same mistakes!q7756264.html
Try giving him a kiss. And see what happens..