It seems to me the song is about a guy who had a crush on a girl but couldn't tell her, so he decided to write it instead. The crush then faded, but he still kept writing because he knew she wouldn't see. But then she did. However, the "who you are in my life" line suggests that maybe the crush didn't fade.
On the other hand, it could also be that he DOESN'T like someone, but couldn't tell for some reason. Like maybe a friend has a new girlfriend he doesn't like, but doesn't want to risk hurting his friends feelings.
It seems to me the song is about a guy who had a crush on a girl but couldn't tell her, so he decided to write it instead. The crush then faded, but he still kept writing because he knew she wouldn't see. But then she did. However, the "who you are in my life" line suggests that maybe the crush didn't fade.
On the other hand, it could also be that he DOESN'T like someone, but couldn't tell for some reason. Like maybe a friend has a new girlfriend he doesn't like, but doesn't want to risk hurting his friends feelings.