You poor thing. Depression is a terrible thing but you can get over it. It's very hard but you can. You have to be very self-disciplined though at a time when you really don't feel like it. My husband had depression a couple of years ago and he's better now. He wanted to go the natural route without taking anti-depressants or other drugs prescribed by his GP.
Firstly, he went to a hypnotherapist. This was fantastic. She taught him, there's no point in dwelling on the past. There's nothing we can change, so you just pack it away and don't let yourself dwell on it. Obviously, it's not as simple as it sounds, which is why you need to have a proper session to teach you how to do this. Move forward - not backwards. We could all benefit from the animal world. They don't dwell on the past, they don't anticipate the future, animals just live for the moment. Self-pity is a terrible thing. Feeling sorry for yourself is pointless, it makes you feel worse and eventually annoys everyone around you. People don't sympathise for long, they get fed up and end up annoyed with you or avoid you, it's just human nature. Make yourself smile, even if you don't feel happy. The very act of smiling releases endorphins in the brain that boost your mood.
Get some natural anti-depressants. 5-Htp and St Johns Wort are fantastic. 5 HTP raises the serotonin level in the brain (happiness hormones) and make you feel 'brighter'.
Go to a good homoeopath, quite often depression is a symptom of physical imbalances. A homoeopath can tell you what vitamins and minerals you are lacking to put you back in balance.
Make yourself go for a walk everyday, even though you don't want to or can't be bothered. I know it's hard but very important. There's nothing like fresh air to help with depression.
Without wanting to sound 'Cranky', if you like reading, get the Dalai Lama book, 'The art of happiness'. It'll change your whole way of looking at the world and if you follow the advice in it, will become a totally 'new' person.
I hope this advice has been helpful. It will be a long, hard, struggle but you will get there in the end - with determination. Then you can just file it away and get on with the rest of your life.