I want to push my gf off me
Are you guys making love, or just in an argument?
Neither. I am just having trouble getting her off of me.
Sounds like she is just playing but of course, you might want to start hitting the gym if you can't push her off. If you don't want her on top of you and you can't push her off, try roll her on the side and that should free you.
It's that simple?
Yes, it definitely is! Both of you can enjoy health benefits if you go to the gym together. You'll be more fit, and it can be a great couple's activity.