Feel like I am outgrowing a friendship

I feel like I am outgrowing my friendship with who was my best friend. I think I’ve felt like I have to stay friends with her and we used to spend every waking moment together. She has really bad codependency and I am worried what would happen if I did walk away from this friendship. In high school I spent all my time with her and just recently got closer with my family because I never saw them because I was always with her. When I’m around her now I feel like I am forcing myself to be and I feel drained and find little things annoying. I feel awful because of how close we are, like insanely close lol. But I feel like I am moving onto a point in my life where I need change for myself and the energy I feel around her just isn’t suiting me and I am not sure what it going on. She used to be really controlling and loud and mean to me and I felt like I wasn’t living my own life, rather living through her life or living her life with her. She isn’t really like that anymore but I still walk on eggshells because she was like that for so long. I find that now, I cant open up and feel comfortable telling her things or sharing my thoughts because she has been quick to judge or snap back. I just don’t know what to do lol