I have dieted and struggled with weight loss enough to know that I have a bit of a pattern. I do really, really well, get excited, lose a bit of weight....
And then it all just stops.
It starts with the exercise. I get caught up with other things, or I just don't feel like it, or something... And I stop. I don't go to the gym, I don't go for walks, I don't do ANYTHING. It's like a switch in my brain turns off and I just decide I don't want to do it anymore.
And then there's food. It kind of creeps up on me. One day, I feel like I'm in control and doing fine and everything... And then all of a sudden I'm snacking on the wrong things, and going out to eat more often, and and and... All of the habits that I was trying to kick come back with a vengeance and all of a sudden I'm back where I started... Or worse.

I guess the good thing is that I'm catching it... Right now. The exercise issue has already happened, I haven't done anything really exercise like in probably two weeks...
The food is still okay most of the time... But I have ended up out a few times, and it doesn't tend to end with the best choices, although not always the worst, either.I just don't know how to get myself on track again and keep the scale moving down. I should go to the gym today, but I probably won't be able to fit it in because I have a paper to write for my final in a class I have tomorrow afternoon. I could go tomorrow... But I'm afraid I'll push it off again because I won't feel like it after doing class.
I just don't want to gain these eleven pounds back. My scale was back at 256 this morning, which I realize is only one pound, but one pound can quickly lead to the other ten. I know that, and I hate it. And I really, really don't want it. I am so, so, SO sick of being the fat girl. But it's the only thing I know how to do consistently, or that's how it seems.
I'm sorry this is so long... I just needed to get this out of my head, and I know you guys will probably have plenty to say about it.

It is so hard, and I have been where you have been MANY times...the switch flicked in my body after a 30 pound weight loss in 06...and its taken me this long to get things going again. You can do it!!! 
What you're doing IS hard and I want to validate that. But, you've got to get back in control of your diet if you want to be successful.