I am at my wits end with my weight loss efforts!?

Just a little info about me first: I am 21, married, 5'3 and 152-ish pounds. When i started my weight loss journey i was 202lbs and miserable. I joined Herbal Magic on Sept. 18, 2008 and since have lost 50lbs. Because i am very short i would like to be about 135lbs. That is my goal and i am supposed to be there in two weeks according to Herbal Magic. I am behind schedule. I have lost my motivation and my drive to stay away from bad foods. I cheat all the time and am stuck. If you are not familiar with the program, i am allotted a certain amount of proteins, starches, fruit, veggies, fat, dairy and a free exchange which is any 100 calorie snack. The diet is easy and works wonders...if you stick to it. That is my problem. Lately the drive to cheat is just there. I don't want to say it's because i'm satisfied with my current weight because although i am ecstatic with my current progress it is still just progress, I do not want to be done. If i don't lose the last 15-20 or so pounds i dont' think i ever will. I have to do it now. I have to get back on track. Any suggestions?