Eat food, yum, yum, yum.
I have been like you are: depressed, cutting, anorexic etc.
I got so severely told off by my friends it was embarrasing and they got me better again. Every time I relapse they flip out and yell at me. That brings me out of orbit and back to reality.
Eat food, it's goooood.
Don't cut, scars are nasty.
Being happy is better than being miserable.