Naiads are mythological nymphs who ruled the rivers and springs of ancient Greece. One of these watery demigoddesses had a famously handsome son named Narcissus, who attracted many admirers, none more admiring than himself. He fell so madly in love with his own reflection that he did nothing but stare at it. Narcissus's friends found this daunting—all, that is, except for another nymph named Echo, whose curse (naiads were highly curse-prone) was that she couldn't voice her own thoughts, only repeat words spoken by others.
In their twisted way, Narcissus and Echo were ideal companions. Both were obsessed with the same person (him), and both expressed the same thoughts, ideas, and opinions (his). I'm sure the next-door satyrs thought their relationship was perfect. Not so much. In one version of the story, Narcissus, unable to work out the logistics of being in love with himself, plunged a dagger into his heart and was transformed into a flower. Echo, devastated, wandered off to haunt canyons and glens, repeating random sentiments shouted by strangers.
Question: Do you see any similarities between your rigid-role "friendships" and the Narcissus-Echo relationship, or do I have to bash you over the head with them? Answer: Too late. Brace yourself.
To paraphrase Tolstoy, unhappy friendships are all different, but those inflexible relationships almost universally signal the psychological dynamics of narcissists and their echoes. On the surface, these friendships look idyllic—as Jennifer Coolidge's dim character says of such a relationship in the film A Mighty Wind, "It's almost as like we have one brain that we share between us." Since no two individuals are identical, such unanimity is always an illusion; the "one brain," or at least the dominant will, belongs to the person both friends implicitly agree is more important. The echo voluntarily surrenders personal needs, ideas, and even rights in exchange for the narcissist's "love," which is actually directed at her own reflection. "Enough about me; let's talk about you," she says with words and actions. "What do you think about me?"
Such relationships exist because narcissism is a basic factor of human consciousness, beginning in infancy. Tiny babies literally can't focus on anyone but themselves. As children grow, however, they realize that others have feelings, needs, and rights. They learn to share and care.