I believe each of us has a few "unrealistic expectations" when it comes to love, relationships, and of course our "soulmate".
We don't want the infatuation phase of our relationships to ever end. That is the time when we make it our number one priortiy to ensure our significant other is happy. Unless there is a major change in behavior towards us or we feel our mate deliberately set out to hurt us.... more often than not we are overreacting. Other times there may be (something else) outside of the relationship which is bothering us and we take it on the person closest to us.