Well, from my experience I can say this. When I was in college. I tipped the scales at 335Lbs... I am 6'1.. I worked out, but not the proper way. It was lift as much as possible. Needless to say not healthy. I was that big for a reason, but there is no reason good enough to be that unhealthy. I then went through some stuff and decided that one thing I can control is my weight.. I decided to really do things right. I didn't diet. I just ate better. I only eat chicken and fish. Along with salads with low to non fat dressing, veggies and rice.. I work out 7 days a week. 6 days with weights 7 days of cardio.. I do 40-60 minutes of cardio using an elliptical trainer... I am now a healthy 190lbs.. No diet, no surgery, just got smarter. But, the only thing that matters is that you will only lose weight if YOU want to. NOBODY or NOTHING can make you do it!!
I wish you all well in your endeavor..