Here's why I'm wondering if I'm the asshole- I knew going into the friendship that she had anger management issues, PTSD &amp; other issues.

We got along well most of the times, but sometimes I'd just say something and she'd flip her shit. It's gotten worse lately.

* I asked her not to vent about Discord too me, because I'd left discord, and because it was a trigger I was working though at the time. She exploded saying I was "the only fucking person I could talk to about it" and an hour later, after I didn't talk to her, she said fine and she would treat it like a trigger. I said thank you. She refused to talk to me for 3 days after that. 

* She said she was happy she attacked her mother &amp; put her in the hospital, and that she would attack one of my friends and put him in the hospital if she could (luckily, she's in a different country than she is)

* She has gotten banned from several places because she told someone she hoped they would die, and that she would kill her. 

* She accused me of not replying to her fast enough then refused to talk to me the next morning (this is why I blocked her, finally; and it's why I feel bad. It's not a huge issue, I was just so tired of the bullshit).

She was often sweet... 

I feel really bad for blocking her and still do, because I know she struggles with anger issues... but I just can't deal anymore.