This song is all about just being crazy in love, and expressing it in a sing-song sort of way.
"See, don't ever set me free
I always wanna be by your side
Girl, you really got me now
You got me so I can't sleep at night"
The guy is obviously half-crazed with the thought that this feeling might not last forever, so he feels that he needs to tell this girl that he is madly in love with her, in order for her to love him to her fullest, so she won't ever let him go. Undoubtedly, the man is in love.
