Hello GrayDee, it's really good of you to do this for your friend because not knowing what to do is worse than actually knowing but can't physically do it, but the only way we can learn is by talking to other people who have also been in your situation.
On this site, the majority of us have suffered from many different illnesses and being able to discuss our problems with them has certainly helped so many of us, and it's anonymous, nobody knows who the other person is, so please try and encourage her to open up, it's just like type an essay but this is much more important.
If not we'd still love to hear back from you, and if I can say that when somebody begins to cry for no apparent reason then something is causing this to happen, and it could be a range of issues that we'd like to talk about.
We don't ever criticise anybody because we have been in similar situations and know what it's like to be treated that way, so it doesn't happen, and along with crying, which I have done myself many times, losing interest in your favourite hobbies or your daily activities means there is a problem.
Please come back and tell us a little more.