To put it simply, it is unspoken love.
Secret love, as opposed to explicit love, can be a unilateral wishful secret love, or it can be a secret love between two parties without showing their admiration. That is, you have love or affection for another person and want to get close to her (him) for various reasons. If she (he) leaves you, you will worry about her (him).
When I hear people around me talk about the ambiguity between me and him/her, I feel very disapproving on the surface, but secretly I feel sweet in my heart, hoping that others will say more.
There are also people who say they don't like or hate her (him) on the surface, but then create various opportunities to be with her (him), and pay special attention to her (him) affairs. She (he) will make others feel that they hate that person. When others say that you like her (him), you will strongly refute. When you are with her (him), you pretend to hate her (him), but in your heart you are happy and want to be closer to her (him).
When he hears that she (he) likes someone else, he will spread it everywhere and let her (him) admit that he does not like that person, which makes him feel satisfied. But sometimes in order to show off, he will continue to fight back and spread rumors to make her (him) completely give up on that person.
Conception: