Hi. I have a friend (loosely used) who is mentally ill. She was diagnosed with an anxiety disorder. For the past two years I have been basically a mother to her. She's very clingy; she's constantly hugging me/leaning on me/touching me. I really wish she wouldn't, but if I ask her to stop touching me she'll get all sad and start crying.

I feel trapped. It's gotten to the point with her that any little thing sets her off. For example, we had an assembly in school yesterday, and there weren't enough sets to fit all of my friend group. As we were in the process of scooting a chair down to fit her, she runs away, crying, because she thought that we did it on purpose. (We did not, but she doesn't listen).

I can't go to events without her because she'll think I'm ignoring her otherwise. I can't go out with other friends with her knowing because she'll think I'm ignoring her. I don't want to hang out with her anymore because I always have to be on edge: any little thing will set her off. When I'm with her, all my attention has to be on her because she's prone to make a scene out of herself for attention. This girl is the perfect example of anxious attachment.

It's suffocating. Honestly, I want to cut her out of my life all together, but I'm afraid she's going to kill herself if I do.

She refuses to go to therapy. Her parents don't force her to go.

Advice please? Both on how to help her out and/or what to do

(I put this in CC because I'm pretty sure some of you will call me selfish, but after two years of having to baby her, I'm at my wit's end)