I am not

I AM NOT YOUR FRIEND IF,
You have to think before you speak to me!  
I AM NOT YOUR FRIEND IF,
My presence ever makes you feel uncomfortable.
I AM NOT YOUR FRIEND IF,
You have to thank me for everything I do for you.
I AM NOT YOUR FRIEND IF,
You don't realise how your smile brightens up my day.
I AM NOT YOUR FRIEND IF,
You would rather keep quiet when you really wanna talk!
I AM NOT YOUR FRIEND IF,
You take too much time to tell me what I mean to you.