First off, congratulations on the 20 lbs you have lost. That is a positive thing, so please smile about that

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I'll be honest I can't imagine these town people saying all these rude things to you. You must be dying to say something back to them, to put them in their place but of course you can't do that. The only thing you can do is control the way you react and feel about their comments. Maybe something to remember is that you are in a different culture. Things that are considered rude here are just matter- of- fact comments there. Maybe remembering that they are not intentionally being rude, it's just their tendency to be blunt. Political correctness is an American thing. Take back the control in the situation. Their blunt comments say something about them NOT you.
The frustrating thing about food addiction is you can't just quit it, like smoking. You can't quit food, you have to quit the negative behaviors around food. I've been an emotional eater for most of my life too. And I've struggled with disordered eating myself. It's taken me most of a year to get this far in my journey to relearn how to eat. The things that seemed to work for me were, number one, if I know I'm heading toward a binge, try to stay in the moment (for lack of a better word), once you go into autopilot it's all over. Distract yourself, something, anything. Take a bath...that's a big one for me. And you got it, exercise. When I exercise my food seems to fall in place also. It's weird. And run in the rain...who cares what they say!!!! Dress for it and if you get sick a bit, stop and then keep going again... tell yourself, when they make their comments, that they are just expressing their deepest concern for your well being

. I know, I know, it's easier said than done. But the more you do it, the easier it gets.
I think you hit on something too. I have a HUGE problem with sugar myself. It throws me into a depression also. I was on anti depressants but wondered if I modified my diet would it help and it did. I limit the sugar in my diet and take my vitamins and I feel SO much better. And it's helped my lose the weight because ( TA DA) it reduces my urges to binge. It's a lot less frequent now. Here's a thought...what I did was refocus on my issues with food. Almost by de-personalizing it. Putting the "blame" on my physical reaction to sugar, not the emotional. I told myself if I decrease the sugar, take my multi vitamin, B complex and Omega ( all good for nerves and mood control) I would feel better. It put more control in what I could do to make myself feel better. Now when I go for the sugary stuff, I think twice knowing how it'll make me feel because I know how GREAT I feel when I'm not eating a ton of it. It just seems to make it more of a medical problem, more tangible. More doable in my mind. Hope that kind of made sense.
Come here for support. This is a pretty active board, or a chat room. It sounds like you feel you are out there all alone, even though you are surrounded by people. Know that you aren't alone...consider this first post your first step into a phase of your life. Take care out there. Hope this cheered you up a bit.