How to deal with codependent mother?

My mom's in her mid 50's, and im about early 20's. My mom had some troubled past that led to her anxiety and rejection to reality. The problem is, my mom was never that independent to begin with, but in a way that she did what she wanted and still had a place to come back to with my dad. She divorced m dad 2 years ago b/c of differences, and she's still with a deadbeat husband that cannot be found. Right now my dad doesn't want anything to do with my mom, and I'm her only emotional support, she still have a few friends left and she can only go out if there are people she knows. Lately she hasn't need me physically with her too much, but she still calls me 10 times a day, and have to see me if there are no one with her. Her doc has been telling her that she needs to practice going out by herself atleast once a week, but she hasn't been doing that for a while. I unfortunately is very emotional too, my health isn't that great either, and my work is stressful. There's many things I want to do for her but don't know how or have he patience to. Ever time when I tell my mom about how she should think about gettin better and start doing something for her future, she tells me that she doesn't think she'll live that long anyways.