Welcome to HW! It really stinks to be like this especially in highschool. I totally know where you're coming from. I suffered all through highschool & college & still! Was quite the athlete too. It's hard to watch everbody go by all normal and stuff without a care in the world. If only they could spend a day in your shoes right?
I'm sure you have been through a lot of this but: have you consulted with an orthopedist? an orthopedic surgeon? (even though it's a surgeon, doesn't necessarily mean you have to have surgery...they are familiar with this sort of stuff). Also, there are hospitals that specialize in bone & joint diseases that are GREAT for trouble areas like this. All they do is connective tissue, joints, bones and rheumatics.
An occupational therapist might help too. Help you stabalize and perhaps get about better. Are you in physical therapy?
When I had to be pulled from sports (track and dance) I worked alongside my schools trainer. I got to wrap ankles, fix cuts, massage, do PT and rehab. It was great and helped me a lot in what I ended up doing career wise (nursing).
Since your long bones still need to stop growing, surgery like the doc said will have to wait.
What is your next step? What type of docs do you see?
Hang in there! I know it's tough.