[header] How to get back at a guy for hurting you [title] Post an unflattering picture of your ex on social media. [step] You do not want to post anything incriminating or very embarrassing. However, an unflattering photo can be a great way to make your ex squirm a little. 
[substeps] Go through old pictures you have of your ex. Does he look heavier in certain pictures? Do you have any where he's making a weird face? Find a few extremely unflattering photos.