That was actually funny, Keefy. Kudos!
My ex had an eating disorder. Thought because she no longer starved herself that she had beaten it...don't mention the fact she would get up every night and eat and then not eat during the day and go run bulk km's on the treadmill to counter it...refused to get help, yet had proven she wasn't able to combat it herself and wouldn't let me help. Got really draining after a while because, as you say, simple things like going out for a meal or just having a fat day weren't a thing. She even used to do some sleep shift job where she was paid (like $7.5 an hour) to be on call for an MS care facility and sleep on some crappy sofa bed there so she didn't have access to food during the night to eat. Fark leaving my house at 9:30pm at night for $7 an hour...
I found the whole thing really sad. Also watched some Netflix movie about eating disorder...the mindset they're in is horrifying...