I don't know why I used to hate this song, then I actually listened to it! Haha, anyways I think the meaning of this song is that people, (not just her ex) need to make up their mind all day everyday, 24/7. I also think that this song sends out a good message to young couples who want to get married, who can't seem to make up their mind, so they should just wait until they are older, so this song can also send out a good message to that kinda stuff.
Please check out my song I posted, brenda song- open up your eyes! K, thanks.