Do I really have to hang out with my gf when I really want to be with my friends?
Why do you want to hang out with your friends instead of your girlfriend?
She asked me to hang out with her, so I'm going to get back at her by doing something she doesn't like. Plus it's something I've always wanted to do.
I don't think you should purposely do something that bothers your girlfriend. If you want to spend time with your friends that's fine, but you should let your girlfriend know.
I'm going to.
I think that's a good idea. It's good to spend time away from your partner and with your own friends. However, it's also important to spend time with your girlfriend, so maybe you could plan to get together soon.