Comment Reposted to your Profile Page.
It means that he didn't let his true feelings be know, he didn't appreciate her when they were together, and when he found out she was with somebody else, he realized it was too late to tell her.
It means that he didn't let his true feelings be know, he didn't appreciate her when they were together, and when he found out she was with somebody else, he realized it was too late to tell her.