i know EXACTLY what you're going through... i've been feeling like you are for the past 2 and a half years. i think about my weight like at least once every 5 minutes, if not more... and that is NOT an exaggeration. every chance i get, i look in the mirror to see if i look any skinnier than i did earlier.
i think about food constantly. it REALLY ****es me off when i think about it WHILE i'm working out... i mean, what good does that do?? it's hard not to think about food. especially at work where people are always snacking or have candy/chocolate sitting on their desks... i don't really ever eat it, but i sit here and listen to them eat it or see it and want it. it's a constant struggle and it's not fun at all!!
when i was reading your post, i felt like i could have been writing it myself.

we are all here for you if you should need anything... support, advice, or just to listen. i think it is always helpful just to get it out there and tell SOMEONE.
let me know how you're doing.