I know what it feels like not to care about yourself.
There was a time that I ate like crap, never exercised, and drank alcohol without restriction. I was overweight and completely out of shape.
One aspect of that lifestyle fun; I was always out partying with friends.
But deep down, underneath all of it, no matter how many times & ways I told myself I didn’t care, and despite the fact that I believed it, the truth remained: I did care.
I couldn’t see it, or didn’t want to, but I did.
That’s how I know that you do too. You might have some emotional work to do before you start lifting weights or jogging, but, you are in there somewhere, waiting to break out.