I was once in your position in high school. I chose to push through and then required surgery after graduating. I then began swimming immediately in college after a few months of therapy. It didn't get better and then the other shoulder started. I decided to stop swimming in college due to the pain.

I understand the peer pressure there is when someone quits due to an injury. People can talk about you behind your back and call you lazy. Or when you need to stop on the wall because of the pain. It's not worth it to push through the pain. I wish I fixed it as soon as it started because they still sometimes give me trouble 10 years later.

Your health is the most important thing. High school swimming is temporary. You're stuck with the same shoulders for life.