Renton - is it the Lighter Life diet that you're following? My niece followed that and got to her target weight over a year ago. She was always a beautiful girl but she is very tall which made her self conscious and the extra weight (she had 5 stones to lose) made her miserable. Since reaching her target she has blossomed and has so much more confidence and joy in life. It hasn't solved all of her problems but in many ways she's like a different girl.
She's maintained her weight since losing it - she eats with the family but has smaller portions and doesn't have some things at all. She says it isn't that difficult as she's gotten into the habit of eating less and in her head knows that she's making a choice between the life she had before and the life she has now and no bacon buttie is worth that. Her biggest problem is booze - she goes out a lot and likes her blue WKDs ......so sometimes she slips up there, but overall she seems to be doing very well.
For her the experience seemed to have given her the determination to keep it up so that it was worthwhile, and she seems to have learned from it. I hope it does for you as well.