Frenemies

I got thousand of friends,
But I can count them in a hand.
I got few foes,
But a hand is not enough.
Fallible notes come from my friends' lips,
And truth they behold.
My enemies lend me a shoulder,
And never stab me at my back.
Friends, they call themselves,
But Liars as I call them.
Enemies, they admitted,
But Friends as I treated.
When tears tumble down my cheeks,
My foes weep with me.
When I am down and cannot stand,
My friends walk away.
Enemies can be friends,
But friends itself, do not trust!