'' im nothing and nobody '' - is it ok to think this about yourself?

You may be recognizing the ego for what it really is, a mere point, but a location in a social network whose only real significance is its links to other such points. Our relationships with others are what give us meaning, definition and identity as individuals. This may seem to be somewhat ironic, but that is the way it works. You should be commended for such clear insight and virtuous humility.