My parents wont let me skateboard anymore and it was practically my life! What to do...?

I hate to tell you this. If skateboarding was practically your life, you don't have much of a life then. Nobody ever got a college scholarship because they could skateboard well. Nobody got a well paying job, because they skateboarded well. See where this is going? It's a hobby. Not a lifestyle. Learn the difference. Your parents know it. Time for you too.