I want to hurt my girlfriend's feelings.
I am surprised that you would want to do this. Why do you want to hurt your girlfriend's feelings?
Because I'm annoyed by her constant nagging, she wears me down.
As annoyed as you are with her it would be mean to hurt your girlfriend's feelings. You should care about the feelings of a person you're in a relationship with.
Girl drama is fucking with my life.
It would be good if you try to have more patience with others. If you can do that you will not have to be cruel by hurting other people's feelings.