I don't know about the obsession aspect but I have had a brush with the losing weight aspect.
I had been gradually gaining weight for a long time. I did not like it. Then in late 2018 I had a routine annual physical checkup and they reported that my
A1C was getting too high. I was not yet diabetic and was only barely on the edge of being pre-diabetic but it was a bad sign.
My limited understanding of diabetes made me think it would be very inconvenient. And the interventions my doctor was proposing sounded onerous. I concluded I wanted to avoid all that trouble and to do so I needed a lower A1C and seemingly the best way to do that was to lose weight...so I took measures to lose weight.
Fortunately, I was
Autism Spectrum Disorder, Level 1 (Mild), retired, disinterested and unskilled for cooking, and married to an
ADHD gal who was often away from the house living her busy life. For the many meals my bride was too busy to provide my food plan was simple...often involving fast-food.
And there were a limited number of convenience-food places I used and my order in each was pretty predictable. (I was quite amused when, in one place, the cashier began ringing up my order—
correctly—before I had even gotten to the counter! In another place they routinely skipped a lot of the standard questions because they knew my preferences.)
I made
small adjustments to my normal orders to reduce the calories involved. Through a year's worth of repetition the small changes accumulated into a loss of 30 pounds (approximately 15 kilograms). And thanks to the weight loss my A1C was fine.
So, I suggest looking at your food routines and making minor adjustments to the routines. Through repetition you might get some nice results!
(For instance: "before" I would have one not-too-large soda, um, soft-drink, from the soda fountain with my meals; "after" I would order chocolate milk. The chocolate milk came prepackaged, was smaller and therefore had fewer calories, and still tasted good.)
Good for you, though I didn’t have a problem ever with losing though just don’t want to lol, really one of my few joys in life is ice cream and candy