It's crazy niggas wanna kill me, we was cool first
And when it comes to friends you can't let 'em too close
That's why they call 'em close friends, you turn your back they move first

from Meek Mill – Polo & Shell Tops Lyrics on Rap Genius

Meaning

The phrase “Keep your friends close, and your enemies closer”, is what his enemies are doing. They’re pretending to be his close friends and as soon as he gives them his trust, they’ll reveal themselves with some kind of betrayal, like a facade. You know, close friends are the one with access to your secrets and will exploit it once you forget them or get them angry. The worst part about the revenge is that it would be someone that you use to trust and spot dollars for, thus the pain inflicted is nothing compared to the emotional pain.

Like William Congreve almost said back in 1697:

Heaven has no rage like love to hatred turned, Nor hell a fury like a homie scorned

He was right!

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