Admit it, you’re a secret stalker. How many hours have you spent clicking through your ex’s photos or agonizing over “likes” from that frenemy whose approval you crave? Social media is becoming an ever-present enabler of bad impulses and obsessive traits. Researchers are calling them iDisorders, and say Facebook and its cousins fuel the fire of jealousy and insecurity that leads people to even less-appropriate behavior. But there’s far more research to be done — both on your cyber-sweeties and the tortured thoughts their posts elicit.