Depressed

So if any of you have had depression or know anyone that's going through it how do you deal with it? I've been like this for a couple years now because of so many things going on with family. I just feel like I have to put on a fake smile and laugh. And I feel that people think I'm trying to put on a pity party or want attention which is not true. I'm not that type of person. So of any of you have advice it is greatly appreciated.