Hello,
Endmetriosis has got nothing to do with fatty liver. NASH (non alcoholic steatohepatitis/ fatty liver) is basically excess fat deposition in the liver along with inflammation. It is usually suspected when the liver enzymes, ALT & AST are raised in the blood and there are no reasons to explain this rise. NASH most often occurs in people who are in their middle ages and are overweight/obese.
If fatty liver is found, then you need to restrict your alcohol intake (if you are taking any) and do some regular exercise like brisk walking for 45 min-1 hour daily. Ursodeoxychiloic acid (UDCA) is supposed to help in reducing the fatty liver.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.