A Complicated Commitment

Pleasure and Pain are both inevitable in any relationship. The various facets of relationship are just like a pendulum. The more its sways away from the equilibrium, the more is the impact on the relationship. Let that be freedom or trust, it should always be within limits. Will both the partners in any relationship feel the same way for everything that happens in their life? Definitely not. If that's the case there will be no fights or hatreds. The subjective aspect of the partners, play a very crucial role in any relationship to stay unbroken. How do people survive this despite the dissimilarities in tastes and emotions?