My favorites in high school may be: I will smile unconsciously when I see you, and blush suddenly when I look at you... One is cautious, one is blatant; one is warm, and the other is domineering; as long as I am by your side, I will shrink into a little kid in kindergarten.
There is a word called preference, there is a word called like, and there is a word called heartbeat.
Concept: Between two people, there is no need to do anything for each other. It is enough to like each other. We are each other's only one.