Lets call him Sergio. Because that's his name. First thing, he's painfully unfunny. He's tries to hard, he makes fart/poop jokes, and says "I like pooping!" All the time. When he tries to be funny he gets himself in trouble. For example my close friend dan was crawling along the gym floor to get his binders (if he walked he could get in trouble because our coach is like that). Sergio begins to push him over and coach tells dan to move away from our spot. Dan explains the situation, coach tells Sergio to move away from our spot, Sergio begins to have a pissy fit as he runs to his new spot. Another thing is he's just a bad friend in general. I've got more stories to tell but one is enough for now.
How should I deal with him?