That was me a year ago. In fact, I thought I was reading my own question. My own experience is that school was the only thing I was good at. It was literally my whole personality. People adored me for it but I knew without my grades, I was a very shallow person. And it's horrible. It hinders your personality development very much. I've seen people's attitude toward me change very dramatically when they know about my grades/rank. Like, you can never rly have that authentic relationship with people. Anyways, university is a lot better. It gives you so much time and freedom to know and work on yourself. No one is as concerned about your grades as is in highschool.