The reality is that we live in an environment where it is easy to eat too many calories of cheap fat-laden, nutrient-poor foods and where exercise must be intentional.
We live in an environment where it is a perfect set-up for obesity.
Eating like "everyone" else, living the status quo= weight gain for most of us.
I'll bet most of us on 3FC have lost and regained in the past, though 150 is very impressive.
It's gotta be forever. Read and read and read the maintenance forum. "Reduced obese" need even more exercise and fewer calories to maintain a healthy weight than those who were never obese.
Successful maintainers keep up the behaviors that lost them the weight. It is scary to think about working so hard and gaining it all back, but like Robin said, use that fear as your ally. Complacency = weight gain.
to you and your friend. What is lovely is that today is a new day....for you, for her, for me, for each of us to engage in the behaviors that will make us healthier.