Nisha, thanks for posting this article. I was also struggling with the I/Thou concept as it was expessed in the textbook. I was online researching it when I saw you post.  Within the article there was a description of I/it and I/Thou that really helped me see the difference between the two.  

"One cannot say the word I without relating to a world outside the self. These two basic words mark two ways of being in relation to the world. I-It relationships are characterized by experiencing and using objects. These are one-way relationships. The I of I-It relations understands and experiences the world as one composed of objects locatable in space and time. This way of relating to the world makes no distinction between people and things"  .... "I-Thou relationships, on the other hand, are two-way relationships based in dialogue. One being encounters another with mutual awareness. I-Thou relationships are characterized by what Buber calls presentness. "

This made quite a bit of sense to me.  As I consider the I/it relationship as one way it means there is not time or effort giving to responses of other individuals.  The I/Thou seen as a two way dialogue not only requires one to engage with the other person but to be activite and present in that relationship or communication for a dialogue to take place.  It really helped clarify the difference between the two types of relationships and grasp the deeper meaning of and "I/Thou" relationship.