I'm going to make a joke diss track calling my friend gay
Why? That is pretty offensive.
I really want to take revenge on him for everything that he has done.
There are better ways to diss your friends. Calling your friends names is not cool.
I'm really dissing him hard. He'll be so mad.
If he is your friend then that is a bad thing for you to do. You shouldn't be calling your friends names. They might not want to be friends with you later on.