My friend cuts herself, what should i do?

Well, she's been clinically depressed for about a year. She's also bipolar. She used to cut herself, but in February she went to the hospital. She stayed for about a week. She claims that she is getting better. She went to the hospital for attempting suicide, not for cutting. She also only eats 700 calories a day. She says that one day she will kill herself, but not for awhile. She seems happy. She told me i was the first person she's told this to. She doesn't tell her mom this, or her therapist. She told me she felt selfish because she feels bad about her life when other people have it much worse. She said she is planning on possibly killing herself next year. Also, she told me there is a 95% chance she will kill herself one day. She hasn't cut herself in about a month. PLease help..thank you:)