If you really want to specialize in UI/UX, then stick with what you’re majoring in now. This is almost a case of getting a “lesser” degree in order to do what you want, If you get a CS degree, you’ll get dragged into full-stack development, which means some of your time will be spent on the front-end, while most of your time will be on the back-end. Full-stack developers make more money than front-end developers, though.