Lyric discussion by veggiestyle 

I agree with xalixo. It's "my whole world felt new"

As for the meaning, I have two theories.

1.) He's taking a good look at where he's at and realizing he's still holding onto a past relationship (ie: dana). He reflects on the relationship in an optimistic way, though, and he knows he'll never forget how she made him feel. This song is him admitting that though he misses her and the relationship was perfect, he has to move on. This is basically him getting closure on that part of his life and using that experience as something to grow from.

2.) This could be about a completely new relationship. He's found a new girl that has finally filled the hole that's brought him down in the past. He's accepting the fact that life goes on, and he's excited that this new love is making his world colorful again.

Either way I think this song can be summed up in a phrase: when one door closes, another opens. It's a song about closure and new beginnings.

Actually, I know for a fact that Shane's (the singer's) girlfriend just died in a car accident, and he said that this song along with the whole album is about her, and how he is coping with her passing.

"Cause you know My world, my world's not over Because I have an angel on my shoulder"

and his girlfriends death is why "That deep down inside I'm hurting But at least I know you're worth it"

An error occured.