Hi Kentgirl...
When I was at the bottom of my depression, although I never even considered taking my own life, I DID often feel like, whilst driving, if I were to be hit by a truck and killed, it could be a good thing. That feeling of utter worthlessness (in your own life and of life around you) can really tear you down. And worst of all, nothing seems fun in a time like that, no matter how much you really should be enjoying it!
Apart from anti-depressants which you probably need at a time like this (and never presume that you can handle it without medical help), perspectives are SO SO important. The world can be a really rough place at times, but there are diamonds out there. Accept that there are nasty things out there, but keep your eyes open for the good ones - and focus on THOSE. I know its much easier said than done, but its a habbit that you can teach yourself. It wont make you feel better overnight, but when you can make the bad stuff into "stupid stuff I cant do anything about anyway", and the good stuff into "this is the life" - it takes so much more for life to knock you down.
Good luck!
:)