I don't know about the rest of you, but if I can't play bass for a few hours, my right hand starts to slap imaginary strings and my left goes into a rousing version of air "Golden Boy."
I can live without a girlfriend (it sucks, but I can do it), but I NEED music.
Music is how I cope with stress, aggrivation, depression, and how I express joy. I can probably live longer without my liver.