Hi whjan25, I agree with jamiee, sometimes we are our own worse enemy, we run ourselves down so much more then anyone else does. I thing if you could find some counselling this would really help you, they will talk with you and work this out with you, at your speed. They won't push you into doing anything you don't feel happy in doing.
I used to feel the same way as you, and if truth be known, sometimes now I get little weak times where I start feeling that way again, but I have been taught the way of positive thinking. The thoughts you are having are negitive thoughts, due to negitive thinking. If you can get to talk to a perfessional (i.e counselling) they should be able to help you train your mind to positive thinking, which is better for you. This isn't easy, I won't say it is, but once we learn to do this life seems so much easier.
Good luck with this. I know it took great courage to post on here, thats the first step to feeling better.
Best wishes
Lee x