She was toxic and disrespected my boundaries, she told me i was being selfish when i told her i would not take responsibility for her actions and her life.
She said my hobbies and passions were secondary to hers and then she tried to gaslight me into thinking i was in the wrong. 
I cut her off.
Now i feel like a part of my heart is gone, i feel empty, i feel bitter, i feel ashamed that i let her do that for so long.
11 years friendship and the moment i draw a line, she leaves me.
Every night I think about it, and it kills part after part of that girl i have been, when i was her friend.
I need help, i feel so bad, i just cant handle this alone.