Be less naive

I still don’t know if the reason I give myself for this goal are in effect due to my naiveness or to something else, but I know that I am, and it’s all but a quality. To be detached, to take things lightly, to trust, ok, but not to be naive. But the margin is so thin!
I think I live too much in m own world, where I can trust most of the people, and where people say what they really think. Too often, in the past two years, have I been fooled and hurt for putting too much faith in peoples around me.
I really have to change.