I've known my best friend since first grade, and I'm getting kind of worried about her. She sometimes goes into these really depressed/hopeless phases for no obvious reason, and neither of us know why, or maybe she does, but she's not telling me. She told me today that she'd "Had a really strong feeling that she was going to die" for (again) no apparent reason over the weekend, of course the end of that story is she didn't actually die, thankfully. Her parents are divorced, so maybe that's part of it, but I have other friends with divorced parents and they don't seem to have this problem. So she wrote this really long letter about who she wanted her stuff to go to, and how much she appreciates her friends and all that for when she was supposed to 'die.' When she's in a normal mood, she's usually really hyper/happy, so I really doubt she's emo or anything like that, she just doesn't seem the type. Can any of you give me an idea of what could be wrong with her?