How about I talk to another girl while in a relationship?
Why do you want to talk to another girl while in your own relationship.
I'm going to have fun with the girl but nothing will happen.
You should not be talking to other people romantically while in a relationship. Even if you dont think anything will happen, you are still putting yourself in a position for something to happen.
I'm not close to my girlfriend, so it shouldn't matter.
If you aren't close to your girlfriend, you should break up. It is unfair to you both, especially if you are going to flirt with other women.