I’ve heard that some people are “givers,” while other people are “takers.” In a true friendship, however, the partners are neither. They both talk when they have something to say, listen when the other person’s speaking, are ready and willing to help when needed, and generally support and care for each other.
If someone gets in touch only when he/she needs a favor, but is otherwise unavailable and just doesn’t have the time, that’s not a friend. If somebody talks, talks, talks but never listens, that’s not friendship.
Haven’t we all had one-sided relationships with people who do nothing but take? At first, we think they’re our friends. Over time, we realize that they’re leeches who make us very tired and frustrated. When we end such relationships, the other parties barely notice; they just move on to the next BFF.