Some people think that when they go to college they must get a degree in a subject that is geared toward a specific career, for example accounting, finance, computer science and engineering. They would never think of majoring in a subject they love, like English for example. I disagree. I think you should study what interests you. College should be about getting an education, but you should also spend time thinking about, and preparing for, your future career.
Loving a subject will only get you so far, unless you want to share your love with others by teaching it. That's certainly one option. If that's not for you, you should make sure you know what your other choices are. Whatever career you decide on, teaching or another, find out what else you have to do to prepare for it. That might mean continuing your education, so if you see that your options are going to be limited with your bachelor's degree, make sure you are willing to spend an extra two to four years in school after you graduate from college.