We are both 17 but I wouldn't tell her parents about it, she would hate me forever. Also, I have made long talks about how much this affects her and she seemed well convinced and said she wouldn't do it again but then started again...
I'm actually on antidepressants since about 2 years now and I'm seeing a therapist but it's a very complicated situation and I don't really go there that often. But you see, depression is not my only problem; I'm also on psychotics and suffer from panic attacks so I'm extra worried about her because of my issues, which I sometimes see on her...