I dont really feel like its my place to say but i would say anyway that you might just need t give her time. my parents seem to need more time then me (the one that is actually going through something). i've just noticed that in my whole time in and out of the hospital and this bad part of my life. im close to my mom too and she blames herself a lot for the things i feel and do to myself but in a nice way i have to keep reminding her, "Mom, It's not about you, It's about me, you didn't make me hate myself so much." so ya thats what i keep telling her and i think thats taking its time for he to see that also.

I hope things work out with you and your mom and dont give up on her just be patient for he to understand. being that she is still your mom shes going to feel a responsibility over you even when you well grown.

~Words from my mother~
"Once your a parent, You are always going to be a parent to your Kids, No matter the age"

I hope that helped a little