I understand your pessimism, and I know it can really be self-defeating when noone seems to want to hire you. Ive gone through periods where I couldnt even find summer employment- just your basic restaurant or retail jobs. I thought I was useless because of this. Sometimes Ive settled for jobs I didnt want initially, sometimes Ive stayed in jobs I wanted to leave just because there was some degree of job security- if I kept coming to work I would have a job and have some money- type thing.
Let me ask you a few questions if you dont mind...as I am curious about the circumstances which you carry into your job search, and how it might affect your success:
1. What year are you in school?
2. What are you studying?
3. Where do you live/go to school?
4. What positions are you seeking?
I dont know if I would be able to help you much, as I am just starting the job search process myself (I graduate in May). I would say its a matter of persistence but I know you dont want to hear that right about now, and I understand.