In one way or another, we have to learn to think following different patterns.
It's so amazing what our mind can provoke in ourselves, for good or bad.
Susan posted a very interesting link in the introverts group about how our mind ( the fears in it) can paralyzed us.

I think that if we put enough effort, we can learn to think in a different way. I know we have ingrain the "skill" to devaluate ourselves but it mights worth to try to revert the process. Perhaps, beginning with a more real way of percive ourselves and the others. It's the fairest we can do.