Best Friend Forever When No One Else Is There
What you call someone who isn't really a friend just so they feel like they are important in your life. You usually ignore this person's texts and only talk to them at school when they are the only okay person around. Usually Asian (more specific, Korean)
Commonly used between two 'Bffs' (best friends forever) to describe the state of being Bff's.
Just like friends have their friendship. Bff's have their Bffness.
Mary: Bee! i think our Bffness is deteriorating drastically!
Jen: What do you mean Eff? Since when?
Mary: Since you've been hanging out with Sally!
Jen: I think your just being paranoid... your my Bff and our Bffness will last forever!