I like making my friend yell
Why do you enjoy making this person yell?
I like when people react in an extreme way, it's so much more entertaining than normal people.
That is a little cruel. You should love your friend, not make them mad intentionally.
I like looking for excuses to yell at them. It's a lot of fun.
That sounds pretty destructive, and hardly a recipe for happiness. You should try to uncover what makes you want to pursue such unfulfilling behaviors.