Replying to Depression

Depression is the worst thing I have ever experienced in my life. I don't know what to do or how to get out of it. The only time I don't feel like shit is when Im drunk or on drugs. Pretty shitty way to make myself feel better but its the only way I can get out of my mental state of depression for at least a little while. If anybody out there on NS has ever overcome depression then it would be great if you could help. I've recently started to tell people how I feel which feels good but I still feel shitty. Basically I just wanna know how I can get out of this cause Im to young to be feeling this way. I'll do what ever it takes cause all I want is to be happy.