Depression is internal - and it will have to be "cured" internally as well...Anti depressants will work only for a time but it will come back unless the source / root is cured. Start by being thankful and realize that you are actually more blessed than others. If you need a friend, an ear, we'd be here. :)
You can't. I know it's not what you want to hear right now, but it's the truth. It's a sickness, and you just have to deal with it one way or another.
It's simple after knowing the stages of grief which is repeating. These are Denial, Anger, Bargaining, Depression and Acceptance. all you have to do is go to acceptance, survive it and go back to denial.
try looing for one good thing or feature in / of every day....celebrate it...begin slowly, don't judge...just experience beauty in every form you find it...let it elevate your consciousness to an atmospher of appreciation...