My friend has bpd along with other things. I know for sure that im her FP or one of many. We have a platonic relationship and tried to turn it sexual but i ended up cancelling on her and she went into isolation mode. She burned bridges so i thought that was it. She came back but i didnt trust her anymore and tried to not seem eager to see her so im thinking she took that as rejection. She has spiraled into a severe state of depression since then. She still talks to me but the eagerness is gone and the convos get shorter and shorter or she leaves when she sees something triggering in anything i say. They have gone from talking all day whenever we could to saying 2 sentences a day. She also deleted anything from her facebook that reminds her of me. The last conversations we had she was acting weird, like saying a ton of self deprecating things and putting words like "goodbye" in the middle of her sentences or randomly in the end of sentences and then blaming auto correct lol. I fear that she thinks that she ruined our friendship and is blaming herself for it or worse about to commit suicide. Shes very hard on herself and she sent me a selfie a few days ago. Her arm was full of severe looking cuts, her eyes were swollen and both her  lips were swollen and had deep bite marks and looked severely irritated. I explained to her why i did what i did and told her that im not mad and we are still friends she said "sounds about right". I feel like such a terrible person, like if i just read more about this i could have prevented that pain from happening. Im just wondering what i can do if anything to help relieve her of this pain. Once she is better ill slowly drift out seeing as i am clearly terrible for her mental health. sorry if its poorly written and not making sense, im very shaken up by this. thank you