Well. Just don't be sad and regretful when later Hikki decides to come back and you "letting-her-go" people become her "unhealthy" fan all over again.

I'm ok if you consider your way of being a fan unhealthy, it's your choice, but I'm not really comfortable with the way you treating her like she's dead or is a devil reincarnation. I mean, burning the poster? You could at least just fold it and put it inside the drawer somewhere.