Lyric discussion by spacemanspiffany 

Maybe I'm focusing too much on just one portion of the song, but this is what I've always thought. And I didn't read all the comments so maybe this has already been said, but here it is anyways.

"The remainders of a shooting star Landed directly on our broke-down little car Before then we had made a wish That we would be missed If one or another just did not exist"

Here, I think Brock is saying that when it comes to a romantic relationship, you want to find someone who you would miss if they never existed. I don't feel this way about someone romantically and I never have (which is the reason for a couple of my break ups in the past), but I do in a platonic way towards my best friend. If she did not exist, if I had never met her then I believe there would be a gaping hole in my life. When it comes to love that's what people are looking for: someone who, if they did not exist, would cause you to feel an absence in your life. So, when Brock says, "That's what I'm/we're waiting for" he means that both he and his current partner are searching for someone that fits this description--and they haven't found it in each other; hence the lines "They both tell me that we're better than this" and " I'm very sorry".

@spacemanspiffany I definitely agree.

An error occured.