I finally moved to New York after creating this blog 5+ years ago. I made it.
I think the lyrics are : "when I run out of ROAD, you bring me home. Regardless, "two hearts in one home" -- aside from living with Anne, Gemma, Des, Robin/ stepdads, he has shared a home with Ben, Meredith, and Louis. I can't think of anyone else. Crashing on Ed's couch doesn't count. The only YOUNG people on the above list are: Gemma & Louis. I dare anyone to tell me, by this logic, that this song is not a love letter to Louis.