I feel for you too! I'm 36 now and went through the exact same things. Please tell your parents about the depression and ask them to take you to an endocrinologist and have all your hormones checked especially your LH level. Depression and anxiety are caused by a low Growth Hormone level which in turn lowers your LH level. Treating LH level if low is the best way to deal with depression. Please tell your doctor this as well and I hope this helps.
Bless you for your message. No it is not a meaningless rant, you need to talk to someone.
It may not be the illness clinical depression that you have, it may be your are going through a difficult time in your life. You could be depressed but not have "depression." There is a difference.
If you are feeling suicidal then you must tell somebody. You cannot deal with it alone.
Don't put yourself down. You have a stable family life and good friends. If you really think you have depression and cannot deal with it, either tell a school counsellor or your parents, or someone close to you. Only a doctor would be able to diagnose clinical depression.
~There is a teenage depression site here I think which may help more.
I have had depression for a very long time, as have many others here, and we are pleased to "talk" to you, if that is what you would like.