I guess relational needs could mean a lot of things. What I mean is all the things that happen in various connections with others. Could be closeness and even intimacy or just respect and recognition (not in the sense of praise, but more in the sense of being understood). For emotional needs, there is overlap since a lot of emotions do happen in relational terms. So the need to be loved or to be considered lovable. To be comforted or supported when in distress. To feel safe. It is not clear to me that you can give any of this stuff to yourself all alone. And why should anyone feel that they would have to? We are "social primates." Regardless of temperament or culture or beliefs, there is just some basic stuff that we seek out in others.