Maybe not about that love, but the connection between a mother and child and the connection between lovers.
I think the song is ironic... remember that. I think the deeper meaning is about the love of a mother.

About the family part:
Well that's your opinion. I know my family would never leave me or let me down. Neither would leave them or let them down.
Simple cause we have been to hell and back and we are still as close as possible and we always will be.

Second thing neither would my best friends, the are always there. Even if I call them in the middle of the night.