Why would u want to see johnny and chris as a couple? Thats just disturbing.
I love how they are 2 of the best friends and that it shows in a lot of things, pictures, gigs, etc.
Anyways, on topic: I think some of the lyrics are based upon Chris's own experiences in love (Gwyneth maybe?). I don't think he wrote this song for one specific person tho. You make it sound like every song has to be written for someone.