I think I'm going to ghost a friend because he sent an awful message to my girlfriend.
Why do you think he sent that message?
You can call that a kind of abuse. I'm going to ghost him
It is hard when a friend does something bad but it is not good to ghost them. It would be better to talk things out and improve your relationship.
I don't care, I'm gonna ghost him.
If you ghost your friend, the neither of you will be able to resolve this issue quickly. Even if your friend was in the wrong, the mature thing to do would be to explain to him why you're not going to talk to him anymore. That way, you can both grow from the situation.