I think the journey can also be meant more figuratively speaking. As the singer has to do/achieve something first and he's hoping that in the end they will find eachother again. Because in this point in life there is something else that has to be done first:
for once in my life i can say i am right about something
i've never been this positively certain
i'm leaving
So, it doesn't sound as if the singer is sure about them meeting again, but he hopes so, because he loves the person he's singing about.
I think the journey can also be meant more figuratively speaking. As the singer has to do/achieve something first and he's hoping that in the end they will find eachother again. Because in this point in life there is something else that has to be done first:
for once in my life i can say i am right about something i've never been this positively certain i'm leaving
So, it doesn't sound as if the singer is sure about them meeting again, but he hopes so, because he loves the person he's singing about.