The freedom that comes with going to college is so much fun - you can really begin to figure yourself out, and with that, you can develop your own unique style out too!
Also, fashion in high school is much more restricted than fashion in college. There may be dress codes, parents telling you what to do, and even social pressure to dress a certain way when you're in HS. One of my favorite things about college is that this doesn't happen anymore!
Essentially, once you're free from high school, you can go your own way with fashion (or decide that you don't care about it at all.) It's your choice to make