I think I'm going to break up with a girl and then lie about it.
Why do you want to break up with the girl?
I want everyone to know that I'm the one that broke up with her.
If you don't care for her then that's fine. You should break up with someone if you're going to do negative things.
I only break up with her to lie to other people.
It's fine that you want to end your relationship with her, but you shouldn't spread lies about your break up. The lies may not only negatively affect her, but if people find out that you're lying then they may not trust you anymore.