Dieting help

Hello...

     I desperately need help to loose some weight & get healthy.  Over the course of the past 6 years I've had breast cancer twice.  During this time, due to lack of energy/exercise and too much comfort food, I've gained about 60 pounds.  I've tried numerous diets and have always failed.  My main problems seem to be portion control, lack of energy and willpower, and that I'm just always hungry.

     I'm planning a trip to Germany to visit my daughter and grandchildren late this summer and would love to loose a considerable amount of weight before then. 

     Is there any help for me?  Please?

Thank you,

Marie