Trust

How important is trust in any relationship? Offlate, I don’t seem to be trusting any new faces that I come across and there is no specific reason for this particular behavior. I am also unsure, if this kind of a behavior is peculiar. When I see people around me blindly trusting strangers, I go crazy, but I keep in mind that, it is none of my business as long as the person is someone whom I can talk to.
Universal fact is that, the word trust is the basis of every relationship and the world runs on trust factor.

But I am not the one who’l trust every Tom, Dick and Harry. But why? No reason