A fresh start

why do we do this to ourselves ........ was doing so well then totally went on a carb binge .......now i have to start again .... why is it even when you know u feel better eating well do you forget how bad u feel after pigging out , it almost like how you forget how delivering a baies hurts .. because you go ahead and do it again ... or i aquate it to being an alcoholic ,,, you must feel bad every morning but you keep doing it .......................... argh how do i stick to this once and for all ... im so very depressed .......... but here i go again ..