How do you stay in control?

When trying to lose weight, how do you stay motivated? You would think I would know, considering 4 years ago I lost 40lbs in less than a year. It was great, I did so well. Now, 4 years later I gained it all back again. Why, you ask? Cause I am lazy and enjoy fatty foods.

Since the beginning of the year I have tried to lose the weight again. I did well for the first couple of months, I lost 10 lbs. It was a great start. Unfortunately since then I have gotten lazy again. I want to go and workout, but the best opportunity for me is after work. Right now I'm taking a class and don't have time between work and class. I get home later and the gym is only open until 10pm. I know its just an excuse, but it is what it is. I was doing well before all these classes and my work schedule changing. I was taking these exercise classes 2 or 3 times a week and was then climbing a few days a week as well. Now I struggle to get to the gym once a week and climb 1 or 2 times a week. I have also lost all control over my eating.

Last night I got home, was a little hungry I thought, but probably wasn't really. What did I do? I ate... a lot. I started and couldn't stop. First I had half a row of Ritz crackers... then I ate probably 2 ups of trail mix... a few hand fulls of regular potato chips (which make me feel ill because of all the grease but i still eat them for some ridiculous reason) and then a couple of cookies. I mean seriously. I must have eaten 600-700 calories in all that nonsense. I don't understand why I don't have control over it. I say to myself, I shouldn't be eating this, but then I just go ahead and eat it anyways.

Things at work are much better, if I pack a lunch I am set and can eat really good. Its when I have to go out to eat I always make a bad choice and eat more than I should. I used to do much better but for some reason I just don't have the self control.

It is so frustrating. I have these goals to lose this weight, to be heathier and to get better at things I like to do. For some reason I just can't stick with it. I hate it.