Hi bluegirl and welcome. It says on your profile that bereavement is one of your concerns. Have you lost someone close to you? If you have it's no wonder you are feeling sad-- it's natural. Maybe there is a support group in your community to help you understand what you are going through and help you.
If that's not your problem then I think you need to get some help. It's not easy to cope with depression. It's a very complex problem which can be caused by several different things. It usually takes a dr. or trained professional to begin to cope with it.
Almost no one can deal with it alone. If you read some of the posts on this forum you will know what I mean. Most of us needed help!!
So that's the good news. Here you will find friends and support and lots of information so you can take control and get better.
Keep posting and good luck