Heart Rate Monitor... I heart you

Running is going really well! The heart rate monitor is really helping me to judge my progress. Since buying it I have run almost every day  and I used it every time. My training partner told me we really are running now which I was delighted to hear!
On Saturday we went for a 6k walk/jog with some really good stretches of jogging in there at least 1.5k a few times... I think this is excellent for week 2!On Sunday I did a 10k walk/run. So pleased that I am sticking with it.
 I am finding the diet aspect really hard at the moment. I do not feel like I can stay on strict Dukan and train for the 8k. Maybe this is just an excuse?? I am finding it hard to not pig out on chocolate :/ Today I failed. I can only commit to doing better tomorrow. I do not really want to be on Dukan any more but I do want to eat healthily... I know how to do it I must just tough it out. I put on three or four pounds over the last fortnight and lost them and put them on again... they are some serious yo-yo pounds but they make my weight-loss badge go under 50lbs lost which is annoying. I went them off for good. I know how to lose them now I must JUST DO IT.