The first major step in dealing with your depression is to actually identify what is causing you to be depressed. Figuring out what is causing you to be depressed will allow you to come up with solutions that can help you fight it out
I miss the girl that made everyone happy and didn't self-harm, wasn't suicidal. I miss the girl that had tons of friends. I miss the girl that didn't need cheering up because she was always happy. I miss the girl who used to be me.