if your issue is that you the way you get your nutrition is to eat the same stuff every day for days on end, then how about you try this
Get the biggest pot you can find, buy some meat with fat on it and bones - eg lamb shanks, throw in all the vegetables you can find - spinach, kale, cabbage, mushroom, onion, tomato, cauliflower , green beans, broccoli ( basically if it grown above ground and its green its great.- ( exclude below ground vegetables especially parsnips and potatoes) add in some olive oil and some butter , vinegar , salt and pepper, simmer the mixture for three hours. Put the whole lot in your fridge, if you microwave a portion of that three time a day for three week things then you will be getting pretty much all the nutrients you need, and your compulsive behaviour at doing it won't damage your health further.
If you got used to that then you could simply switch to another type of meat the next time - pork, lamb beef and maybe start mixing it up by adding some spices, each time you would still be eating the same food all the time, except that this time that "same food" would be a nutricious mix of the good stuff instead of something that is not giving your body the nutrient it needs.
I don't have an eating disorder, but I have found doing the above invaluable in both trying to bring down my blood sugars and losing weight because it means I always have a snack handy which is both good for me and tastes really nice that I can simply warm up a spoonful if I feel the need to eat. I make my stew at the weekend, then pretty much eat it all week - I mix it up a bit so sometimes I take half a cup without any of the meat and add water to turn it into a "cup-a soup", sometimes I take it with some meat and add cream to make a very filling stew, sometimes I add a bit of wine, sometimes some different vegetables - eg cauliflower and butter mashed .
so you could see if you can do the same thing and gradually get better at eating a bit more variety.
I hope that helps !
then mayb graduating to eating the stew with some freshly done vegetables - eg sprout on the side.