Are my Reserves Slipping?

I'm a little over one month into this whole experiment, and I can see resolve slipping at the edges. Interesting to observe myself during this time, I am getting better at justifying transgressions and moving on without a second thought. Case in point, yesterday met with a visitor from Seattle to walk around the art area called 798. Beautiful day, sun is shining, birds are singing and there's some awesome art to see...and I was working up an appetite. We stopped at my favorite cafe long after my hunger pains started, and without a second thought ordered spaghetti with vegetables. I bypassed a few salads and went straight for the carb load. It was delicious, practically ate the bowl when I was finished. Luckily the portion was relatively small, but the pont is I just ordered it and ate it and moved on. And later in the evening (usually the most vulnerable time of day), I felt myself obsessing with the frosted cupcakes sitting in the kitchen. Drawn to the sugar, drawn to the yum...I was successful in abstaining, but the conversation I had with myself, about 100 times, went something like this "who cares, you've been good about exercising, what's the big deal...hmm, you're slipping, why is this so appealing to you now, what is driving this behavior that only a frosted cupcake will make you happy..." blah blah blah. It feels like a month ago I had reserves of steel...now it feels like reserves of play-doh. Just interesting to observe. I am feeling rewarded that I dropped a size in pants, at the same time I wonder if I am destined to plateau here...and does just writing it make it so? We shall see...