Hi, Sharon! I am an emotional eater, too (as I'm sure many, many of us here are). I'm re-learning, though, so I know it isn't impossible.
You've already got some excellent advice in this thread, but I want to post a few back-ups, and what has really helped me maintain a low-carb way of eating, even though I was stuck in a stall for months. Let me preface by saying we made it through the holiday season, illnesses, death, funeral, and the whole nine yards without having to resort to high-carb foods.
First off, don't leave home without your sidearm. In fact, make sure you're packin' at least a pair of cheese sticks, no matter where you go, and add a couple of handfuls of nuts for the ammo. That may not seem like much in the line of food, but that alone can keep you from being hungry for absolutely hours.
As for the water thing, I keep a 32-oz. mug with me at all times. I have no idea how much water I drink in a day, but that mug gets refilled with ice water at least 6 times a day. If I'm heading to town, I fill with ice water before I'm leaving and will occasionally refill with caffeine-free Diet Pepsi but by the time I get back home I'm dying for more ice water. (I previously drank at least one 2-litre bottle of Diet Rite a day--now I drink the equivalent of one can or less.)
When you're on the road, the same rules apply. Always make sure you have snacks, and if you have to grab fast food that's not a problem, either. Just grab a bunless sandwich (burger or chicken with no breading). Some places will even serve your sandwich in lettuce (Carl's Jr./Hardee's, maybe more).
At family get-togethers, simply take food you can eat. At Christmas I provided at least half the food because I wanted to make sure I had plenty of stuff I could eat. The thing is, you can serve a completely low-carb meal to friends and family, and they will never even know the difference. The only place I ran into trouble was at my father-in-law's funeral last week. Everything was done so quickly I had no time to prepare. 'Dinner' ended up being macaroni salad, hot dogs, tortilla chips and packaged cookies. I ate a couple of hot dogs with no buns.
I think a lot of our successes on this way of eating is how committed we are to it. I have a lot at stake (potential diabetic), so for me it's pretty easy to give it that commitment. When you think about where you're headed healthwise if you don't do it, it can be a pretty scary thing.
Oh, and about that depression! I've gone through the gamut my whole life (probably should've been medded, but preferred not to). I have learned, though (and it took a long time), it isn't what we looks like that makes us the person we are. Each one of us can be a completely worthy person no matter what size our case is. And don't think about that old size 5 or 6 right now! Sometimes goals we set for ourselves are just too overwhelming. I remember in the movie "The Core". They were set on a journey to try to save the world. One of the team said, "I can't save the whole world! That's just too much! But I am going to try to save three of them." Of course, in so doing, they managed to save the world. Think of your weight loss that way. Don't set off to lose all of it at once. Set off to lose 10 pounds, or one clothing size. Then once that's gone, set off to lose another. Believe me, it's seems a lot more attainable.
Oops! I'm editing because I forgot something! I have health issues that keep me 'down' frequently. I've found that if I either do something on my computer something else with my hands (embroidery, etc.) I don't just sit here and eat out of boredom.