>>15379964People outgrow each other, or after seeing the full extent of the other's personality they get turned off by it and want to leave. It happens all the time, even I thought melfanon was more interesting than he seems to be.
It's something completely normal. Look, I know it's shitty especially since you said he was your first internet friend, but you cannot do anything else than just move on. Further ruining your reputation by doxxing or trying to blackmail him is the worst thing you can ever do so stop it.