It's been a year and a half since my ex and I have been together. We were a couple for 3 years and that ended largely because of my paranoia. I kept thinking she was cheating on me, trying to isolate her from her friends who I feared, and I constantly feared she would cheat on me with my own friends. It was very extreme. There were some red flags but that doesn't change the fact that my reactions were totally disproportionate. In light of my concerns, when we parted ways, she promised never to refollow my friends on social media again (I had asked her to unfollow them). Except that today, I just saw that one of my former friends that I was dreading the most followed my ex who followed him back. I want to cry, to send him a message, to insult him... I am angry at myself for being like this. Why after so long I continue to spy on his social networks obsessively? Why does it impact me so much? I feel completely crazy...