Entirely different context, and therefore an entirely different definition of "friend".
The song's context infers an equal relationship - it's sappy and saccharine-sweet. Frankly, it sounds like a poem a love-sick teenage girl would write to her equally love-sick boyfriend. It sounds - well - juvenile and immature.
I would also daresay that Abraham would have a much different take on his relationship with God than a catchy "JC is my buddy" song.
Kinda Childish, huh?
And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven. Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven. (Mat 18:3-4 KJV)