Jo,
You look GREAT!! Really fantastic!
But I know that may not make a difference in how you feel...because I feel the same as you. It's like there's some kind of mental "recovery" process involved after major weight loss -- like recovering alcoholics knowing they will ALWAYS be alcoholics (I know that's a drastic comparison, but it's the best thing I could come up with -- so I hope I didn't offend anyone).
Someone should write a book about this weird self-image that is left over after losing weight.