Good idea?

My ex and I are back in contact and I know he wants to get back together and so I do I. However I want him to work really hard to get me back(he broke up with me) so I don't want him thinking he's got me wrapped around his finger. I want him to sweat a little. I don't text him first and when he flirts with me I brush him off. However I'm still as playful as I used to be with him. Is this a good idea?