Best Friend

I used to call you my best friend
Until you left me round the bend
Those people round you won't let go
Until they do, you'll never know

We did our best to help you through
But after all, it's really up to you

You said you'd never let me down
But I know you've been on the town
You say it's over, you've seen the light
But I'm still waiting in the night

We did our best to help you through
But after all, it's really up to you
  
Notes.
How do you help that friend who 
just does not want to be helped?
 
Original image from WW11 US recruiting poster.