Long story, me and my diets

To cut a very long story short, years ago I stopped eating and went down to about 6 and half stone.
Diagnosed with under active thyroid, after putting lot of weight on. Before being diagnosed did WW, SW, never lost on ounce due starving myself and thyroid problem. Diagnosed and started on medication, decided to diet again. Same thing as soon as I 'diet' something seems to happen in my head associating 'diet' with 'don't eat' . So I stop eating again.
But I didn't do this at all on SlimFast, this os the only diet I can do that doesn't make me want to stop eating to lose weight, but I get terrible stomach problems so had to stop doing it.
So best thing for me is not to 'diet' . I am just eating better and less of it,lol. But if I want a packet of crisps I have them, just not every day and not 3 bags
