I  am going to suggest to not pay rent.
You have to be kidding. Is there an alternative to paying rent?
I'm tired of doing what her parents say. It's not even my house.
If you live somewhere then you need to pay rent. This is just what responsible adults do.
I'm going to get a job this summer and save some money, then I will move out and stay with my girlfriend.
That's a really great idea into getting independent! The two of you have to fly the nest someday. I think you and your girlfriend would be proud of how far you will get.