One day he broke up with his girlfriend and a few hours later he posted on Facebook that he was in a relationship with me. And his other friends get in on the joke to congratulate him just to piss her off.
I felt bad for the girl and angry for his childish behavior. I fought with him because even though the girl hated me it didn't seem fair. Besides, why did he use me to annoy her?
The worst part is that I have witnessed this kind of behavior in guys very often. What's the need to do things like this?