I know how you feel, I've been sad too (I am not sad, I am depressed. Sometimes I am sad because, well, I am a human being. But sadness is a normal and healthy reaction to upsetting events. Depression does not need something to cause it. This is the equivalent to comparing being out of breath from running to being out of breath because you have asthma...)
Is it because you're unemployed (no, but that, sure as ****, ain't helpin'!)
Have you tried yoga/meditation/speaking to god/etc. (You know, pretending I believe in something is not going to help. Why not ask me to try believing in magical fairies who will lift away my depression like bees lift pollen or realigning my chakras (which, for the record, don't exist) or cutting a deal with Baron Samedi with some rum and candies (voodoo, in case you were wondering))