^^ JG, I can definitely relate to what you're sayin .. I have never considered myself to have any sort of "eating disorder," not even sure how I got into this thread (curiosity I suppose).
I've always been quite skinny and about 40 lbs under ideal weight (I've been about 6'3 / 135 lbs, or ~ 1.9 m / 61 kg for those of you with a sensible measurement system). I am not now, and with a few days' worth of exceptions, have never been a stimulant user.
Over the last couple years, though, I've found it progressively harder to eat anything more than one full meal with a few supplements throughout the day. Huge swaths of potential food/meals I used to eat/enjoy have been scratched from the list as too unhealthy/complex/whatever.
Right now for breakfast/lunch I'm eating a can of peaches (which I won't be able to finish). Yesterday it was 6 oz. of milk, with some organic tomato soup and carrots.
I'm no health nut (unfortunately); I try to eat healthy, but for dinner usually binge on something unhealthy like too much pizza or burritos .. then always feel bad about it and restrict what I eat the next day.
I've been teased my entire life about my weight, even now when I'm well into adulthood. From this I can definitely relate to all those who treat such chastising as further motivation to resist gaining weight .. my skeleton frame has become a personal identity of sorts; when others give me crap it only re-enforces in my mind that I'm better as a result.
Just recently I've experienced some minor-to-moderate, random/unexplainable stomach/G.I. issues, which has only inspired me to eat even more sparsely. I swore to myself I'd start eating healthier, but I'm rather stuck in my habits, so we'll see how that turns out.
For the past ~7 years I've really wanted to gain weight, but I think I might have dropped to about 130 this summer (not sure, just how I feel).
Probably has something to do with why I've never been in a relationship
I really wanted to convert to vegetarianism (for ethical reasons), but after struggling on and off for a couple months I abandoned it; I don't lack the creativity or food resources to come up with enough meat-free food to keep me alive.
Amazing how we can handle so many other personal problems, but at the end of it all, the most basic human survival item of food intake is still something we can't properly master.