talk to his best friends

theres nothing like talking to your ex loves best friend to get him jealous. it might be alittle harsh but think about it... he broke your heart, so toy with his. added bonus you might actually start to like his best friend and sence they actually are best friends they might share some similarities, so he might be more like your ex just 100x better:) try it out, i did an im in love and made my ex wish he never let me go!!:)