Seems like he has bigger issues right now than he is letting everyone know about. I don't have a clue as to what you can do, but just remember not to take it personally. He is probably more confused than you are right now. Maybe he still did have strong feelings for you and after he read what you wrote it tore him apart. I would apologize for that, but tell him you were pissed at him when you wrote it because you felt that he was being an asshole. Best of luck to you.

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An eye for an eye makes the whole world blind.