I'm so sorry that you're feeling this depressed.  No one can judge whether or not your problems are "large enough" to warrant depression - it's such an individual thing in how we handle situations in our lives.  And it IS hard to know sometimes what is just normal teenage stuff and what's not.  But if you're thinking about suicide, that's not normal teenage stuff.  Do you think you could ask your parents to find you some help?  You could just tell them you are depressed and don't know why, without mentioning that you feel like killing yourself sometimes.  I understand how parents can freak out over that.  But I want to tell you something - my older son DID try to kill himself, twice, and while I don't believe in suicide (I don't think most do), that wasn't the first thing I thought about.  We had already gotten him help and I was very glad that he told me about how terrible he felt - when he was only 12.  Your parents might be more sympathetic than you think.  If nothing else, could you get an appointment with your regular doctor for a physical and talk to him/her about your concerns? Or another possibility would be a counselor at school.

So, what do you think you might be able to do?  You are very wise to recognize that something is not right and that you need help.  Let us know how you're doing and if you're able to get what you need, okay?  You are probably important to more people than you realize and they will be glad to see you feel better.