I'm going to cut off my friend.
Why are you going to cut your friend off?
He's such a manipulative bastard and I hate him.
Communicate with the friend and see if the friendship is worth saving. If there is no going back in the friendship, tell them why you don't want to be their friend and don't be scared to express your feelings.
I'll talk to him but if he doesn't want to change then It's his loss and my gain.
You into the conversation with a more positive attitude. If you go into with animosity then he will be defensive.