Darkpurplesecrets said it better than I could but I just want to add you are not alone. I had ideas of suicide at 8 years old and like you I had a normal family. I am much older than you but I can tell you I have suffered from depression all my life but there has been some very good moments also, some good years and that is what gives me hope, when those good days come I am very grateful.
I havent been around here very long but I can tell you it is filled with wonderful people who really care and will be here for you when you need it.
I hope you feel better soon