How to not take astronomy?

My gf hates science. So she's going to take astronomy for her science credit. BUT, my major requires chemistry. So I'm going to take chemistry in the fall. She says that she absolutely CANNOT take astronomy alone without me, so I'm going to take chemistry and astronomy next year. The thing is, I really don't want to take astronomy. I'd really like to get another class out of the way this fall, like english 2. I'm already taking chemistry, calculus, and computer science, and I feel like taking astronomy on top of those 3 might be too hard, and it would probably be better to take a non-science class. I do have a little interest in astronomy, but not much, and I don't want to take the class. And my gf doesn't understand that and is begging me to take it saying she needs me. IDK what to do! I don't want to fight with her anymore over this. But I don't want to be overwhelmed with schoolwork next semester. Help?