How does one save themselves?

I eat and I feel guilty  
then I overeat and feel guiltier still

but I can't seem to stop  
I fear my body will rot  
 
I want to be healthy and happy  
I want to make good choices for myself  
choices I know I should be making  
choices I know would make my life better
 
but I don't have the strength  
so I just sit in my room as I write and chew  
 
I am miserable and numb at the same time  
I can't make up my mind  
it's hard to breathe and I'm dying on the inside  
 
I need saving from myself