When you think of someone, it is the most precious memory you have.
When people think of you, you know that is the sweetest moment.
Tell him/her, when you think of him/her.
If you never say, he/she would never know.
Because
One day you may not be able to tell him/her anymore,
One day he/she does not have the chance to know it anymore
One day you or he/she are unable to remember anymore
Everything is too late
Touched by Korean drama series 刀手吴水晶