To be blunt: its not rocket science. You eat less and move more and stop dieting right now.
Dieting sets you up to fail. We deprive ourselves, have something 'bad' then feel awful, and have something 'bad' because we feel awful.
Look at what you eat and why.
This is what I did after Christmas (size 16, 5ft 4, beachball ):
For a week I ate whatever I wanted, but I wrote everything down. I was at what I consumed but didn't actually eat IYSWIM. A biscuit when the kids had one, a bit of chocolate when I opened the fridge door... by the second week I realised that just thinking about what was going in made me eat less. It was a really good way of taking some control (control being a key word for me).
I can pin point the reasons why I eat what I do. DP being away so a 'treat' at the end of the day, that kind of thing.
Portions - use a smaller plate. Dinner plates are much bigger than they used to be.
Eat with the children at tea-time. Don't eat afterwards. A cup of skimmed milk at bedtime to stave off any hunger pangs.
Have a big breakfast (eggs are great) a good lunch, and a moderate dinner.
After taking control I signed up to weightwatchers online (I appreciate the hypocrasy of shouting STOP DIETING at you ) but this gives me the parameters within which to work (i.e. portion size and snacking which is my downfall). And it gives me control, as I still keep track of everything.
I go to the gym at 6.30am and am back in time to do breakfast at 8. I hate going, but love it once I am there.
I'm a size 12 now
I really hope something here helps. I wish you all the very best of luck, it really is possible