[monkeygirl123]

I have two very close friends, and we do pretty much everything together. One of my friends has had a few minor problems in the past - staying up really late and not sleeping enough, not eating very much (but she says she eats if she's hungry), being stressed out by too many after-school activities. Today at lunch though, my other friend noticed cuts on her wrists. i didn't get this at first - they pretty much stood in the bathroom and talked about it during lunch. but i heard bits of their conversations later, and from what they were saying it was pretty clear that she was cutting. i heard her tell my other friend that sometimes she wanted to stop, but usually she didn't get what was wrong with it. should i tell her i heard this conversation when i shouldn't have? and what can i say to her to make her realize that she shouldn't be doing this?