I've learned that a central aspect of my 28 year long eating disorder is that my early abuse taught me to view my body as an object for others peoples use/abuse/feelings etc.
Only now at 40 am I starting to understand that my body's first role is for me to live inside and experience the world from. This is definitely helping my healing from my eating disorder. Essentially my eating disorder drives me outside my body, viewing it from the point of view of a critical observer.
I have gained the ability to control what my T calls "stories" untrue ideas that only exist in your mind, usually negative for me. For example she said she could schedule me in for an extra session before I left for vacation, then realized shed double booked and the other person was already scheduled over a week before. Rationally I understood it was a mistake but another part of my brain started going nuts with "she doesn't love me, she doesn't want to see me, etc etc and this tide of emotion connected to my past would sweep me away.now I can recognize when I am doing it. I can't always control the panic but I can control the narrative in my head.

I've learned that my feelings are valid and real. But that doesn't mean they reflect the reality of the situation. I can feel terribly lonely but that doesn't mean I am actually alone.

I've also learned to explore my spiritual side and find ways to build myself up.

I've started to believe I might be worthy of love and have processed a lot of painful memories.

There is more but those are the first things I thought of...