Once upon a time I took a mini- Economics class in college and mainly learned one thing. No I learned a lot but one thing stuck. The sunk cost effect. I remember it because it's all about how some people put so much into something that they can't walk away from it. Basically, they are blinded from other possibilities. So make sure that in your personal, academic, and professional life you are open to other options even if you have invested a lot.
PS. Change that major if you need to and watch your happiness increase in college hahaha