Having good support--people you can talk to-- can help a lot when you're fighting depression.
It's a hard thing to deal with all by yourself.
There are online communities where you can talk to other people who are dealing with depression. And you can do it without using your real name. And remember, counseling can help too.
Talking with a counselor can help you understand the things in your life that keep you feeling down and find ways to cope with them. Depression medicine can help you stop feeling down, and that will make it easier for you to start practicing these new life skills. And getting good sleep and regular exercise and avoiding alcohol and drugs can help too.