Anyone else has experienced this. I was depressed and sad most of my life growing up. Bad childhood,  bullying at school, suicidal thoughts.... it got better, then my dear girlfriend left me, my grandma who was like mother to me succumbed to cancer, going from a woman full of life to a lifeless shell who couldn't even speak, my dad being a wreck... I suppose I accepted that life doesn't owe you happiness. It owes you nothing. I guess it is just supposed to be a fight and one has to be brave enough to face it. I feel like I am not depressed, I am sort of..bitter but grateful. Not happy, but I have come to terms with the fact that happiness is not the key. I like Nietzsche. A great philosopher. We ought to face our destiny with courage