Teenage angst vs real problems

Hi folks, I have mentioned in this section before about my oldest daughters self-esteem problems. But it seems to be going well beyond that right now and I don't know how to handle her. She has completely pulled away from the family (that part I somewhat expect as a teen) but everything seems to suck for her even things she claims she enjoys. Her premise seems to be that if she can't be the "best" at something, why bother doing it at all..?? She also seems to be far too influenced by her "friends". What got me the most worried recently was that she told me she took the Ivan Goldberg Depression Test online. I was trying to be supportive so I took it also. I got a 40. (Anything above 35 is considered high risk for depression). She scored a 77!!! I don't put a lot of stock into these kinds of things but it has me worried because some of the questions on there are about committing suicide, etc. Just so you know, I have depressive traits so I know where she gets it but she has SO much going for her (more than I ever did). Obviously screaming at her doesn't work (my wife's favorite tactic :) ) and trying to have an "adult" conversation with her about it does nothing. She has always been pretty mature for her age so we have always been able to have more "grown up" conversations with her about just about anything. Am I just being a nervous nelly? Any advice on letting it alone vs knowing when to have real concerns??

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