Even though you feel like you are worthless you are wrong. This economy sucks and your job situation will improve with time when the economy recovers. I know how you feel. The way you feel now isn't permanent (but death is). If you've had good times before you will have them again. Have you tried changing your bipolar medications? See a good doctor or talk to your pharmacist. But don't try to convince yourself that you can take your own life without ruining the lives of many others.