Now seriously, how can anyone give you advice if they do not know the circumstances and situation? What is she hoping to change? She is asking you to change somethings to make it better, so obviously there must be (for her) some flaws or frustrations to the current arrangement.
What is she asking you to change? To cut your long nappy hair? That would be simple, to dress better, that would be easy. On a different level, if she is asking you to discontinue A.S. use that is one thing you have to weigh in the overall content. But something like not going to the gym is just plain bullshit. Do not let her "changes" and "wants" compromise who YOU are as a person. People can change to a certain extent.
It is nice that you love her, but after reading this, you are bordering on obsessive love. Which is not healthy at all. It is manifesting itself in you through lack of eating, confusion, insecurity, and lack of sleep. Do not let anyone have this control over you. Maybe you should hear her out and still move out. Find time to like YOURSELF first and then worry about finding someone who likes the person you already ARE and not their idea of who you should be.
come on, tell us more about the changes. But first, get something to eat.
One the bright side, at least she has said she doesn't want to see other people. You have that going for you. She obviously still has something there for you.