I have a friend who is new to Buddhism. He is in love with the bodhisattva Guan Yin. He has a deep devotion to her. Do Buddhists worship bodhisattva? How do they usually venerate these people? What is the difference between a Buddha and a bodhisattva? My friend is new to this so he really can’t answer them for me. I believe that he wants to join Tibetan Buddhism. Thank you.