My happiness is you, but your happiness is not necessarily me. What do you mean?

All my happiness is given by you, and your happiness is not necessarily given by me. According to Wen Rui's inquiry. Com, my happiness is you, but your happiness is not necessarily me. I mean, all my happiness is given by you, and others can't give me happiness. I can't give you happiness, which proves that the other person already likes you, wants to stay with you all the time, and doesn't want to be separated from you.