Lack of Commitment

I have a lack of commitment to pretty much every idea I can think of. It seems to me that I can critically analyze ideas, though I am deluded by believig this, but I lack the critical nature to form beliefs, since much of the bigger picture continually escapes me. Is it possible to be critical and yet somehow arrive at no conclusions fairly consistantly? I tend to think critical thought should arrive at some logical conclusion. Since this only tends to be the case with me regarding very simple concepts, I conclude that my "critical analysis" is flawed, ignorant, stupid and often has me going in circles. I conclude this because I know it must be the case. And this is the only valid conclusion I can come to through my "critical thinking". I pick up another piece of information and I follow it, regardless if it is contrary to my previous set of tenuously-held beliefs because, in reality, I have no beliefs.

I expressed this sort of "feeling" (if it can be called that) to someone who seemed more together than I, and after a fairly lengthy conversation going in circles, he said a phrase I've never forgotten, but I don't remember if he said I was heading toward it or already in it or what... anyway, he called it "the dark night of the soul". I've since looked up the phrase many times online and it's a pretty apt description in many ways.

Does anyone else have this particular problem? What is the secret to firmly believing something and knowing you're right?

(Please feel free to copy + paste an extremely long bit of information from the web which is barely related to this topic at all-- especially Anthony).