the Song is about love. there is a girl he really is loving, probably emma, and he will always wait for her an be there. he did not know how a Person can made him feel so good and loved.

"Cause I'm here, I'm always right here"
he will always be there for her and give a fck about the opinion of others.

"Baby, I'm leaving
I'm not taking anything but you" the only thing he is needing is his girl nobody and nothing other has this prioraty to him.