Very sad story to hear, but don't be sad, there are good things in life too.
Success doesn't come always at the first try, there are many hardships, I wen't through some myself, it takes a change of attitide, and I think the depression will go away.
If not, just ask out for help, there is no shame in it, there is therapy for this, and maybe a little talk will help, letting out the bad feelings and talking to someone expert who knows how to help you.