I'm going to tell my friend to fuck off and never see me again
Why do you want to tell him off?
I don't have time to spend with him. He doesn't do anything but entertain me with stupid stuff.
Even if you are friends, you should still respect each other and talk to each other nicely. It would ruin any memories of your friendship if your last memory is a fight.
No, I don't care about him. I will go ahead and tell him off.
It is your choice but it would be better to do it respectfully. Doing it rudely will likely damage the relationship permanently.