Losing your best friend

Stupidity is only realised when the stupidity id done,
Regret is so painful its hotter than the sun,
When you lose a best friend,
You lose a part of you,
And if the fight is bad enough,
You'll lose both the two,

If apologies aren't working,
and there's nothing you can do...
Then your friend wasn't a friend
but a person you never knew!