Just checking in with people like that can help them a lot. The nicest person I ever knew was a cute, very small gay girl (who my sister almost dated, but my Mom had issues with it for dumb reasons). She tried to kill herself with a Tylenol overdose. One time she asked me to talk to her seriously, and stated how, due to her upbringing, she felt dirty when she touched herself.
Don't blame yourself at all. People have to choose to help themselves. My issues are because I don't do enough to help myself, and complain too much about others. People can only get help if they want to accept it.
If you still care for her, just send her kind posts, jokes you think she might like, stuff like that. No pressure, though, situations like that are really tough. I hope she gets better.