Ok so this is what the song means to me:
in the begining it is saying that she started out feeling love then she started out knowing and hopeing he loves her back. At 1st it was quit and known to her. Now it is a word. Love.
The word love started getting a stronger and stronger meaning as she was experiencing it.
Then she is saying ik we will get back together. You just say when, and I'm there for ya baby.
Hen she is saying with us changing(people knowing) it doesn't mean we can still love eachother and now it doesn't have to b ruined just cuz people know.
Then try to get thu it and love me as much as I will love you.