When they say Yes you sarcastically go oh sh*t uhhh no ones ever said yes before and act all nervous she'll give you that wtf face and you just smirk and laugh. Or be like ugh nvm I changed my mind she'll be all f u and then you smirk laugh she probably slaps you because she likes you etc. Or if they are with friends be like oh wait I want her too lol. Just little things here and there make a world of difference.

Sarcasam + Confidence = Key for Sucess!