This fic was back from season one. I don't think Kurt was dating anyone at all but if he was it was probably Puck. But I really do think it's a gen fic. In this Kurt has Orthorexia and possibly OCD. Orthorexia is an eating disorder where you're overly obsessed with all of your food being very healthy. I think he might of had a freak out over oreos or a cake or something like that.
It's not the new fic being written by ellie226. It's something old.