Okay, now you have admitted it - now is time to change it. Change something, whether it is getting back to the gym, or fixing the eating. Make plans. I am a firm believer in writing out goals and plans. Having them in concrete makes them easier to follow.
And you know, when you feel the most like running away from here and not posting - that is the time when you need to be here the most! Use the phenomenal support system that is available here. It has helped me more times than I can count.