i'm sorry to hear that too
i lost some friends of mine not long ago (in quite a nasty way to lose'em...) a suicide bomber (you all know about whats going on in israel) blew up my favorite cafe 15 minutes after i left... unfortunately my friends didnt left...
anyway i still think that what brought you into music was some sort of pain and that you dont have to be sad to be creative you just have to feel it for sometime before
it has to settle down in you and that sometimes takes time...
not everybody who sais he's happy is really heppy
"i'm so heppy 'cause today i found my friends..."