I'm going to say I'm tired of my friend who is being a snake.
Why do you think so? what are you going to about it?
I would take off his skin even though he is dead
It is wrong to have to deal with a person acting like a snake. You should be honest and call them out on their shit.
I thought it would be fun to enjoy his suffering. Why should I help him.
There is no need to claim that you enjoy the suffering of your buddy. Just do your best to do what is right and not focus as much on this friend. As long as you are moral than at the end of the day you can be cool with your decision.