Secret love? Maybe. The vague good feeling in the past is the reason why you unconsciously pay attention to the other person now, but it is not enough to be the beginning of a relationship. Moreover, now she and he, can they tell whether they want to restart the youthful throbbing that ended before it started, or remember the long-lost youth.
Intention: It's just a vague good feeling, which can't be let go but is not persistent. It occasionally pops up from the bottom of my heart and then retracts in an instant. When we meet after many years, is the person you see still the same person?