5'8" 130 pounds seems entirely reasonable, I would say 110-140 is about right for that height.
82... What do you see when you look in the mirror? Do you look sexually attractive, curvy? Do you see a paunch? Do you see your ribs and still want to lose more?
I'm curious. I'm not necessarily helpful, I'm currently struggling with my own body image [not anorexic, I do love to eat], but I'm wondering how closely your perceptions match others'.