"I like him very much."
"Then are you going to confess your love?"
"No."
"Why? Do you like him so much and don't let him know?"
"If you like him, you just like him. Just confess. After all, my liking for him is my business alone."
Intention: Secret love is your own business, there is no need to let the other party know. Otherwise, how can it be called secret love?