You're going to have to understand, kind of let yourself understand, that there are reasons for everything-including lack of "will power." There are basically no bad reasons, just things that happen which are filtered through you and your prior experiences, and have a certain effect. The thought of doing what it takes to lose the weight right now is more uncomfortable than the other options.
Instead of looking at it as a huge project, try looking at it as a day long experiment. You can always go back to living as you did, but try one day of clean diet and exercise. Then if you like it, try another.
