My friendships aren't really about shared interests. My friendships are about shared personalities that just mesh. My friendships are about people who, whether we think alike or not, whether we agree on things or not, we just like each others' personalities and have an ease at just shooting the breeze that really doesn't take much effort.

Is it possible you are defining friendship as shared thoughts and interests and missing the whole compatibility piece that is probably much more important in a friendship?

This other part of friendship is the ability to be quiet and just listen. Sometimes if a person is too dominate in pushing their ideas or they dominate conversation, that stifles communication and turns people off. That ability to just listen and be there with a person is often what strengthens a relationship.