Is the healthy emotion due to mutual understanding?

Happy feelings, two people often think of each other and know how to express their love in the way that the other person wants.

Unfortunate feelings, there is always a person who puts himself in a very high position, pointing fingers at things, finding faults, poking pain, and making the other person unbearable.

Happy feelings, two people fulfill each other and know how to be grateful. In order to give each other a better life, * * * work together.

Unfortunately, there is always one person who doesn't love deeply enough, and it is very painful for Ta to face all the efforts of the other party with cold violence.

It can be seen that the feelings paid unilaterally are always easy to get hurt, often with a good start, but not so happy ending.