Jenny,
Be careful and never say never. You'd be surprised what you'll try once you start your stall. The stall hits us all, except perhaps for the very lucky few. We all want to believe we can stay faithful for life because of the rapid results we see in the beginning. When you hit a stall that lasts several months, frustration sets in and then start the attempts at refeeds, fat fasts, plan swaps, etc. all in a desperate attempt to get the scale moving again. (I suppose some even resort to gasp exercise!) Keep the faith!