What was the most fucked up thing your ex did after you broke up?

He was my very first boyfriend and everything started out pretty good but after some time he became a little bit obsessed with me. Calling me "goddess" and "light of his life" up to a point where it could almost be considered as a really weird form of worshipping. It was too much for my young heart and I decided to break up with him. I did it during one of our daily phone calls in the evening. When I told him he started to breath really heavily and I just started to cry because I just broke that boy's heart. He didn't say anything so I just hung up, went to my mum and hugged her because it was harder than I expected but I felt relieved and happier already. But after that the real shit began. At first he decided to start wearing nothing but black clothes. Not a single colour anywhere. Whenever I saw him at school he never looked up, he always looked at the floor. All his profile pictures on his social media accounts were turned to black and white, he crossed his face out and wrote "DEAD" all over it and sent me weird messages. Then I saw him sitting at a fountain outside of school where we used to meet once. He tried to injure himself with a comb he borrowed me once. Several days later he gave me a drawing he made for me (he drew a portrait of me) written on it was "I still love you.". I was seriously creeped out. Some weeks later the police was in our school to investigate on something, they took writing samples of some students who had access to a room where some maps and other stuff was stored. It turned out that somebody wrote "I will kill you all" on a blackboard in there and everybody was scared somebody was going to start a school shooting. Guess who did it? Correct, my beloved ex-boyfriend but he meant it in some sort of "I will kill you with my existence because my existence is poison to all of you" (More or less exactly his words). I felt incredibly bad because I was afraid it was my fault that every student was scared and did not feel well when going to school and that I ruined that boy's life. It was not a good time.

tl;dr: Ex-Boyfriend went crazy and caused a small police operation.

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