It is all about expectations anyways, isn't it?
What breaks or makes a relationship is how much you expect and how much you actually get in return.
There comes highs and lows too. In the beginning you have very low outlook on how the other person maybe, but as the chemistry and attachment increases, so do expectations. And that's where compromise steps in.
So the other person might not always be a gentleman, or he may not be in the mood to express just as much, that doesn't mean you throw everything away just for that one day.
Simmer down, look away, pretend like that part of disappointment didn't exist, and move on.
But too many disappointments lead to anger. And anger cannot be extinguished with just thoughts.
Why do we expect in the first place anyways?
Why do we wait for the other person to return to us what we have given out of love?
If you love, then you should love. Not expect anything in return. That's not love. That's expecting the other to feel the exact same way you feel, which is very unrealistic. Because every person has a different life situation, different school of thoughts, different goals in life and different wants and needs that change according to time.
So expectations kills a relationship.
And some relationships are too precious to be wasted away like that.