Relationship is a friction
Imagine two fully pumped balloons. When they are touching each other — friction occurs. And some friction is required in order for relationships to function.
If one of the balloons deflates itself (partially or fully) — the deflated balloon is not manifesting itself fully. If there is still some friction — relationship is unproportionate. If it deflates fully — then there is no contact, no friction, this balloon is not manifesting itself at all and it can hardly be called relationship.